{"id":4661,"date":"2020-04-21T17:23:52","date_gmt":"2020-04-21T17:23:52","guid":{"rendered":"https:\/\/courses.lumenlearning.com\/mathforliberalartscorequisite\/chapter\/the-coordinate-plane\/"},"modified":"2021-02-05T23:56:20","modified_gmt":"2021-02-05T23:56:20","slug":"the-coordinate-plane","status":"web-only","type":"chapter","link":"https:\/\/courses.lumenlearning.com\/slcc-mathforliberalartscorequisite\/chapter\/the-coordinate-plane\/","title":{"raw":"The Coordinate Plane","rendered":"The Coordinate Plane"},"content":{"raw":"\n\n<div class=\"textbox learning-objectives\">\n<h3>Learning Outcomes<\/h3>\n<ul>\n \t<li>Plot Ordered Pairs\n<ul>\n \t<li>Identify the components of the coordinate plane<\/li>\n \t<li>Plot ordered pairs on the coordinate plane<\/li>\n<\/ul>\n<\/li>\n \t<li>Identify Quadrants on the Coordinate Plane\n<ul>\n \t<li>Identify the four quadrants of a coordinate plane<\/li>\n \t<li>Given an ordered pair, determine its quadrant<\/li>\n<\/ul>\n<\/li>\n<\/ul>\n<\/div>\n&nbsp;\n\nThe <b>coordinate plane<\/b> was developed centuries ago (in 1637, to be exact) and refined by the French mathematician Ren\u00e9 Descartes. In his honor, the system is sometimes called the Cartesian coordinate system. The coordinate plane can be used to plot points and graph lines. This system allows us to describe algebraic relationships in a visual sense, and also helps us create and interpret algebraic concepts.\n<h3 id=\"Introduction\" class=\"no-indent\" style=\"text-align: left\">The Components of the Coordinate Plane<\/h3>\nYou have likely used a coordinate plane before. For example, have you ever used a gridded overlay to map the position of an object? (This is often done with road maps, too.)\n\n<img class=\"alignright\" src=\"https:\/\/s3-us-west-2.amazonaws.com\/courses-images-archive-read-only\/wp-content\/uploads\/sites\/1468\/2016\/02\/04064226\/image001.jpg\" alt=\"A picture of a manhole that says Drain and a small blue object. The picture has a grid overlaying it, with the columns labeled at the top A through F. On the left, each row is labeled with 1 through 6. The small blue object is in square 4F.\" width=\"248\" height=\"251\">\n\nThis \u201cmap\u201d uses a horizontal and vertical grid to convey information about an object\u2019s location. Notice that the letters A\u2013F are listed along the top, and the numbers 1\u20136 are listed along the left edge. The general location of any item on this map can be found by using the letter and number of its grid square. For example, you can find the item that exists at square \u201c4F\u201d by moving your finger along the horizontal to letter F and then straight down so you are in line with the 4. You\u2019ll find a blue disc is at this location on the map.\n\nThe coordinate plane has similar elements to the grid shown above. It consists of a horizontal <b>axis<\/b> and a vertical axis, number lines that intersect at right angles. (They are perpendicular to each other.)\n\n<img class=\"aligncenter\" src=\"https:\/\/s3-us-west-2.amazonaws.com\/courses-images-archive-read-only\/wp-content\/uploads\/sites\/1468\/2016\/02\/04064227\/image002.jpg\" alt=\"A graph with an x-axis running horizontally and a y-axis running vertically. The location where these axes cross is labeled the origin, and is the point zero, zero. The axes also divide the graph into four equal quadrants. The top right area is quadrant one. The top left area is quadrant two. The bottom left area is quadrant three. The bottom right area is quadrant four.\" width=\"417\" height=\"378\">\n\nThe horizontal axis in the coordinate plane is called the <b>x-axis<\/b>. The vertical axis is called the <b>y-axis<\/b>. The point at which the two axes intersect is called the <b>origin<\/b>. The origin is at 0 on the <i>x-<\/i>axis and 0 on the <i>y-<\/i>axis.\n\nLocations on the coordinate plane are described as <b>ordered pairs<\/b>. An ordered pair tells you the location of a point by relating the point\u2019s location along the <i>x-<\/i>axis (the first value of the ordered pair) and along the <i>y<\/i>-axis (the second value of the ordered pair).\n\nIn an ordered pair, such as (<i>x<\/i>, <i>y<\/i>), the first value is called the <b>x-coordinate<\/b> and the second value is the <b>y-coordinate<\/b>. Note that the <i>x-<\/i>coordinate is listed before the <i>y-<\/i>coordinate. Since the origin has an <i>x-<\/i>coordinate of 0 and a <i>y-<\/i>coordinate of 0, its ordered pair is written (0, 0).\n\nConsider the point below.\n\n<img class=\"aligncenter\" src=\"https:\/\/s3-us-west-2.amazonaws.com\/courses-images-archive-read-only\/wp-content\/uploads\/sites\/1468\/2016\/02\/04064228\/image003-1.jpg\" alt=\"Grid with x-axis and y-axis. A blue dotted line extends from the origin, which is the point (0,0) along the horizontal x-axis to 4. A red dotted line goes up vertically from 4 on the x-axis to 3 on the y-axis. That point is labeled (4, 3).\" width=\"417\" height=\"378\">\n\nTo identify the location of this point, start at the origin (0, 0) and move right along the <i>x-<\/i>axis until you are under the point. Look at the label on the <i>x-<\/i>axis. The 4 indicates that, from the origin, you have traveled four units to the right along the <i>x<\/i>-axis. This is the <i>x-<\/i>coordinate, the first number in the ordered pair.\n\nFrom 4 on the <i>x-<\/i>axis move up to the point and notice the number with which it aligns on the <i>y-<\/i>axis. The 3 indicates that, after leaving the <i>x<\/i>-axis, you traveled 3 units up in the vertical direction, the direction of the <i>y<\/i>-axis. This number is the <i>y-<\/i>coordinate, the second number in the ordered pair. With an <i>x-<\/i>coordinate of 4 and a <i>y-<\/i>coordinate of 3, you have the ordered pair (4, 3).\n\nLet\u2019s look at another example.\n<div class=\"bcc-box bcc-info\">\n<h3>Example<\/h3>\nDescribe the point shown as an ordered pair.\n\n<img class=\"aligncenter\" src=\"https:\/\/s3-us-west-2.amazonaws.com\/courses-images-archive-read-only\/wp-content\/uploads\/sites\/1468\/2016\/02\/04064229\/image004-1.jpg\" alt=\"A point that is 2 spaces above the x-axis and 5 spaces to the right of the y-axis.\" width=\"417\" height=\"378\">\n\n[reveal-answer q=\"668288\"]Show Solution[\/reveal-answer]\n[hidden-answer a=\"668288\"]\n\nBegin at the origin and move along the <i>x-<\/i>axis. This is the <i>x-<\/i>coordinate and is written first in the ordered pair.\n<p style=\"text-align: center\">(5, <i>y<\/i>)<\/p>\nMove from 5 up to the ordered pair and read the number on the <i>y-<\/i>axis. This is the <i>y-<\/i>coordinate and is written second in the ordered pair.\n<p style=\"text-align: center\">(5, 2)<\/p>\n\n<h4>Answer<\/h4>\nThe point shown as an ordered pair is (5, 2).[\/hidden-answer]\n\n<\/div>\n<h3>Describe the point shown as an ordered pair<\/h3>\nhttps:\/\/youtu.be\/c9WVU34MY5Q\n<h3 id=\"Plotting Points in the Coordinate Plane\" class=\"no-indent\" style=\"text-align: left\">Plotting Points in the Coordinate Plane<\/h3>\nNow that you know how to use the <i>x-<\/i> and <i>y-<\/i>axes, you can plot an ordered pair as well. Just remember, both processes start at the origin\u2014the beginning! The example that follows shows how to graph the ordered pair (1,3).\n<div class=\"bcc-box bcc-info\">\n<h3>Example<\/h3>\nPlot the point (1, 3).\n\n[reveal-answer q=\"28562\"]Show Solution[\/reveal-answer]\n[hidden-answer a=\"28562\"]\n\nThe <i>x-<\/i>coordinate is 1 because it comes first in the ordered pair. Start at the origin and move a distance of 1 unit in a positive direction (to the right) from the origin along the <i>x-<\/i>axis.\n\nThe <i>y-<\/i>coordinate is 3 because it comes second in the ordered pair. From here move directly 3 units in a positive direction (up). If you look over to the <i>y-<\/i>axis, you should be lined up with 3 on that axis.\n<h4>Answer<\/h4>\nDraw a point at this location and label the point (1, 3).<img class=\"aligncenter\" src=\"https:\/\/s3-us-west-2.amazonaws.com\/courses-images-archive-read-only\/wp-content\/uploads\/sites\/1468\/2016\/02\/04064232\/image005.jpg\" alt=\"Graph. A blue arrow goes from the origin (the point 0,0) to one unit to the right. A red arrow goes from the blue arrow to 3 units above the x-axis. That point is (1,3).\" width=\"417\" height=\"378\">[\/hidden-answer]\n\n<\/div>\nIn the previous example, both the <i>x-<\/i> and <i>y-<\/i>coordinates were positive. When one (or both) of the coordinates of an ordered pair is negative, you will need to move in the negative direction along one or both axes. Consider the example below in which both coordinates are negative.\n<div class=\"bcc-box bcc-info\">\n<h3>Example<\/h3>\nPlot the point [latex](\u22124,\u22122)[\/latex].\n\n<img class=\"aligncenter\" src=\"https:\/\/s3-us-west-2.amazonaws.com\/courses-images-archive-read-only\/wp-content\/uploads\/sites\/1468\/2016\/02\/04064233\/image006.jpg\" alt=\"Graph with blue arrow pointing from origin to four units to the left. A red arrow points down 2 spaces to the point negative 4, negative 2.\" width=\"417\" height=\"378\">\n\nThe <i>x-<\/i>coordinate is [latex]\u22124[\/latex] because it comes first in the ordered pair. Start at the origin and move 4 units in a negative direction (left) along the <i>x-<\/i>axis.\n\nThe <i>y-<\/i>coordinate is [latex]\u22122[\/latex] because it comes second in the ordered pair. Now move 2 units in a negative direction (down). If you look over to the <i>y-<\/i>axis, you should be lined up with [latex]\u22122[\/latex] on that axis.\n\n[reveal-answer q=\"118522\"]Show Solution[\/reveal-answer]\n[hidden-answer a=\"118522\"]Draw a point at this location and label the point [latex](\u22124,\u22122)[\/latex].[\/hidden-answer]\n\n<\/div>\nThe steps for plotting a point are summarized below.\n<div class=\"textbox shaded\">\n<h3>Steps for Plotting an Ordered Pair (<i>x<\/i>, <i>y<\/i>) in the Coordinate Plane<\/h3>\n<ul>\n \t<li>Determine the <i>x-<\/i>coordinate. Beginning at the origin, move horizontally, the direction of the <i>x<\/i>-axis, the distance given by the <i>x-<\/i>coordinate. If the <i>x-<\/i>coordinate is positive, move to the right; if the <i>x-<\/i>coordinate is negative, move to the left.<\/li>\n \t<li>Determine the <i>y-<\/i>coordinate. Beginning at the <i>x-<\/i>coordinate, move vertically, the direction of the <i>y<\/i>-axis, the distance given by the <i>y-<\/i>coordinate. If the <i>y-<\/i>coordinate is positive, move up; if the <i>y-<\/i>coordinate is negative, move down.<\/li>\n \t<li>Draw a point at the ending location. Label the point with the ordered pair.<\/li>\n<\/ul>\n<\/div>\n<h3 id=\"video2\" class=\"no-indent\" style=\"text-align: left\">Plotting Points on the Coordinate Plane<\/h3>\nhttps:\/\/youtu.be\/p_MESleS3mw\n<h3 id=\"Introduction\" class=\"no-indent\" style=\"text-align: left\">Identify quadrants and use them to plot points<\/h3>\nThe intersecting <i>x-<\/i> and <i>y-<\/i>axes of the coordinate plane divide it&nbsp;into four sections. These four sections are called <b>quadrants<\/b>. Quadrants are named using the Roman numerals I, II, III, and IV beginning with the top right quadrant and moving counter clockwise.\n\nOrdered pairs within any particular quadrant share certain characteristics. Look at each quadrant in the graph below. What do you notice about the signs of the <i>x-<\/i> and <i>y-<\/i>coordinates of the points within each quadrant?\n\n<img class=\"aligncenter\" src=\"https:\/\/s3-us-west-2.amazonaws.com\/courses-images-archive-read-only\/wp-content\/uploads\/sites\/1468\/2016\/02\/04064235\/image008-1.jpg\" alt=\"A graph with many plotted points in different quadrants. Quadrant 1 has the point (1,3); the point (2,2); and the point (4,1). Quadrant 2 has the point negative 1, one; the point negative 2, 5; and the point negative 4, one. Quadrant 3 has the point negative 2, negative 3; the point negative 3, negative 3; and the point negative 1, negative 5. Quadrant 4 has the point 2, negative 1; the point 1, negative 3; and the point 4, negative 4.\" width=\"417\" height=\"378\">\n\nWithin each quadrant, the signs of the <i>x-<\/i>coordinates and <i>y-<\/i>coordinates of each ordered pair are the same. They also follow a pattern, which is outlined in the table below.\n<table>\n<thead>\n<tr>\n<th>Quadrant<\/th>\n<th>General Form of Point in this Quadrant<\/th>\n<th>Example<\/th>\n<th>Description<\/th>\n<\/tr>\n<\/thead>\n<tbody>\n<tr>\n<td>I<\/td>\n<td>[latex](+,+)[\/latex]<\/td>\n<td>[latex](5,4)[\/latex]<\/td>\n<td>Starting from the origin, go along the <i>x-<\/i>axis in a positive direction (right) and along the <i>y-<\/i>axis in a positive direction (up).<\/td>\n<\/tr>\n<tr>\n<td>II<\/td>\n<td>[latex](\u2212,+)[\/latex]<\/td>\n<td>[latex](\u22125,4)[\/latex]<\/td>\n<td>Starting from the origin, go along the <i>x-<\/i>axis in a negative direction (left) and along the <i>y-<\/i>axis in a positive direction (up).<\/td>\n<\/tr>\n<tr>\n<td>III<\/td>\n<td>[latex](\u2212,\u2212)[\/latex]<\/td>\n<td>[latex](\u22125,\u22124)[\/latex]<\/td>\n<td>Starting from the origin, go along the <i>x-<\/i>axis in a negative direction (left) and along the <i>y-<\/i>axis in a negative direction (down).<\/td>\n<\/tr>\n<tr>\n<td>IV<\/td>\n<td>[latex](+,\u2212)[\/latex]<\/td>\n<td>[latex](5,\u22124)[\/latex]<\/td>\n<td>Starting from the origin, go along the <i>x-<\/i>axis in a positive direction (right) and along the <i>y-<\/i>axis in a negative direction (down).<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\nOnce you know about the quadrants in the coordinate plane, you can determine the quadrant of an ordered pair without even graphing it by looking at the chart above. Here\u2019s another way to think about it.\n\n<img class=\"aligncenter\" src=\"https:\/\/s3-us-west-2.amazonaws.com\/courses-images-archive-read-only\/wp-content\/uploads\/sites\/1468\/2016\/02\/04064237\/image009-1.jpg\" alt=\"Graph with quadrants. Quadrant 1 is positive, positive. Quadrant 2 is negative, positive. Quadrant 3 is negative, negative. Quadrant 4 is positive, negative.\" width=\"417\" height=\"378\">\n\nThe example below details how to determine the quadrant location of a point just by thinking about the signs of its coordinates. Thinking about the quadrant location before plotting a point can help you prevent a mistake. It is also useful knowledge for checking that you have plotted a point correctly.\n<div class=\"bcc-box bcc-info\">\n<h3>Example<\/h3>\nIn which quadrant is the point [latex](\u22127,10)[\/latex] located?\n\n[reveal-answer q=\"222353\"]Show Solution[\/reveal-answer]\n[hidden-answer a=\"222353\"]\n\nLook at the signs of the <i>x-<\/i> and <i>y-<\/i>coordinates. For this ordered pair, the signs are [latex](\u2212,+)[\/latex].\n<p style=\"text-align: center\">[latex](\u22127,10)[\/latex]<\/p>\nUsing the table or grid above, locate the pattern [latex](\u2212,+)[\/latex].\n\nPoints with the pattern [latex](\u2212,+)[\/latex] are in Quadrant II.\n<h4>Answer<\/h4>\nThe point [latex](\u22127,10)[\/latex] is in Quadrant II.[\/hidden-answer]\n\n<\/div>\n<div class=\"bcc-box bcc-info\">\n<h3>Example<\/h3>\nIn which quadrant is the point [latex](\u221210,\u22125)[\/latex] located?\n\n[reveal-answer q=\"999799\"]Show Solution[\/reveal-answer]\n[hidden-answer a=\"999799\"]\n\nLook at the signs of the <i>x-<\/i> and <i>y-<\/i>coordinates. For this ordered pair, the signs are [latex](\u2212,\u2212)[\/latex].\n<p style=\"text-align: center\">[latex](\u221210,\u22125)[\/latex]<\/p>\nPoints with the pattern [latex](\u2212,\u2212)[\/latex] are in Quadrant III.\n\nUsing the table or grid above, locate the pattern [latex](\u2212,\u2212)[\/latex].\n<h4>Answer<\/h4>\nThe point [latex](\u221210,\u22125)[\/latex] is in Quadrant III.[\/hidden-answer]\n\n<\/div>\nWhat happens if an ordered pair has an <em>x<\/em>- or <i>y-<\/i>coordinate of zero? The example below shows the graph of the ordered pair [latex](0,4)[\/latex].\n\n<img class=\"aligncenter\" src=\"https:\/\/s3-us-west-2.amazonaws.com\/courses-images-archive-read-only\/wp-content\/uploads\/sites\/1468\/2016\/02\/04064238\/image010-1.jpg\" alt=\"Graph of the point (0,4). The point is on the y-axis.\" width=\"417\" height=\"378\">\n\nA point located on one of the axes is not considered to be in a quadrant. It is simply on one of the axes. Whenever the <i>x-<\/i>coordinate is 0, the point is located on the <i>y-<\/i>axis. Similarly, any point that has a <i>y-<\/i>coordinate of 0 will be located on the <i>x-<\/i>axis.\n<h3 id=\"video1\">Identify quadrants and use them to plot points<\/h3>\nhttps:\/\/youtu.be\/iTsJsPgcE4E\n<h2>Summary<\/h2>\nThe coordinate plane is a system for graphing and describing points and lines. The coordinate plane is comprised of a horizontal (<i>x<\/i>-) axis and a vertical (<i>y-<\/i>) axis. The intersection of these lines creates the origin, which is the point [latex](0,0)[\/latex]. The coordinate plane is split into four quadrants. Together, these features of the coordinate system allow for the graphical representation and communication about points, lines, and other algebraic concepts.\n\n","rendered":"<div class=\"textbox learning-objectives\">\n<h3>Learning Outcomes<\/h3>\n<ul>\n<li>Plot Ordered Pairs\n<ul>\n<li>Identify the components of the coordinate plane<\/li>\n<li>Plot ordered pairs on the coordinate plane<\/li>\n<\/ul>\n<\/li>\n<li>Identify Quadrants on the Coordinate Plane\n<ul>\n<li>Identify the four quadrants of a coordinate plane<\/li>\n<li>Given an ordered pair, determine its quadrant<\/li>\n<\/ul>\n<\/li>\n<\/ul>\n<\/div>\n<p>&nbsp;<\/p>\n<p>The <b>coordinate plane<\/b> was developed centuries ago (in 1637, to be exact) and refined by the French mathematician Ren\u00e9 Descartes. In his honor, the system is sometimes called the Cartesian coordinate system. The coordinate plane can be used to plot points and graph lines. This system allows us to describe algebraic relationships in a visual sense, and also helps us create and interpret algebraic concepts.<\/p>\n<h3 id=\"Introduction\" class=\"no-indent\" style=\"text-align: left\">The Components of the Coordinate Plane<\/h3>\n<p>You have likely used a coordinate plane before. For example, have you ever used a gridded overlay to map the position of an object? (This is often done with road maps, too.)<\/p>\n<p><img loading=\"lazy\" decoding=\"async\" class=\"alignright\" src=\"https:\/\/s3-us-west-2.amazonaws.com\/courses-images-archive-read-only\/wp-content\/uploads\/sites\/1468\/2016\/02\/04064226\/image001.jpg\" alt=\"A picture of a manhole that says Drain and a small blue object. The picture has a grid overlaying it, with the columns labeled at the top A through F. On the left, each row is labeled with 1 through 6. The small blue object is in square 4F.\" width=\"248\" height=\"251\" \/><\/p>\n<p>This \u201cmap\u201d uses a horizontal and vertical grid to convey information about an object\u2019s location. Notice that the letters A\u2013F are listed along the top, and the numbers 1\u20136 are listed along the left edge. The general location of any item on this map can be found by using the letter and number of its grid square. For example, you can find the item that exists at square \u201c4F\u201d by moving your finger along the horizontal to letter F and then straight down so you are in line with the 4. You\u2019ll find a blue disc is at this location on the map.<\/p>\n<p>The coordinate plane has similar elements to the grid shown above. It consists of a horizontal <b>axis<\/b> and a vertical axis, number lines that intersect at right angles. (They are perpendicular to each other.)<\/p>\n<p><img loading=\"lazy\" decoding=\"async\" class=\"aligncenter\" src=\"https:\/\/s3-us-west-2.amazonaws.com\/courses-images-archive-read-only\/wp-content\/uploads\/sites\/1468\/2016\/02\/04064227\/image002.jpg\" alt=\"A graph with an x-axis running horizontally and a y-axis running vertically. The location where these axes cross is labeled the origin, and is the point zero, zero. The axes also divide the graph into four equal quadrants. The top right area is quadrant one. The top left area is quadrant two. The bottom left area is quadrant three. The bottom right area is quadrant four.\" width=\"417\" height=\"378\" \/><\/p>\n<p>The horizontal axis in the coordinate plane is called the <b>x-axis<\/b>. The vertical axis is called the <b>y-axis<\/b>. The point at which the two axes intersect is called the <b>origin<\/b>. The origin is at 0 on the <i>x-<\/i>axis and 0 on the <i>y-<\/i>axis.<\/p>\n<p>Locations on the coordinate plane are described as <b>ordered pairs<\/b>. An ordered pair tells you the location of a point by relating the point\u2019s location along the <i>x-<\/i>axis (the first value of the ordered pair) and along the <i>y<\/i>-axis (the second value of the ordered pair).<\/p>\n<p>In an ordered pair, such as (<i>x<\/i>, <i>y<\/i>), the first value is called the <b>x-coordinate<\/b> and the second value is the <b>y-coordinate<\/b>. Note that the <i>x-<\/i>coordinate is listed before the <i>y-<\/i>coordinate. Since the origin has an <i>x-<\/i>coordinate of 0 and a <i>y-<\/i>coordinate of 0, its ordered pair is written (0, 0).<\/p>\n<p>Consider the point below.<\/p>\n<p><img loading=\"lazy\" decoding=\"async\" class=\"aligncenter\" src=\"https:\/\/s3-us-west-2.amazonaws.com\/courses-images-archive-read-only\/wp-content\/uploads\/sites\/1468\/2016\/02\/04064228\/image003-1.jpg\" alt=\"Grid with x-axis and y-axis. A blue dotted line extends from the origin, which is the point (0,0) along the horizontal x-axis to 4. A red dotted line goes up vertically from 4 on the x-axis to 3 on the y-axis. That point is labeled (4, 3).\" width=\"417\" height=\"378\" \/><\/p>\n<p>To identify the location of this point, start at the origin (0, 0) and move right along the <i>x-<\/i>axis until you are under the point. Look at the label on the <i>x-<\/i>axis. The 4 indicates that, from the origin, you have traveled four units to the right along the <i>x<\/i>-axis. This is the <i>x-<\/i>coordinate, the first number in the ordered pair.<\/p>\n<p>From 4 on the <i>x-<\/i>axis move up to the point and notice the number with which it aligns on the <i>y-<\/i>axis. The 3 indicates that, after leaving the <i>x<\/i>-axis, you traveled 3 units up in the vertical direction, the direction of the <i>y<\/i>-axis. This number is the <i>y-<\/i>coordinate, the second number in the ordered pair. With an <i>x-<\/i>coordinate of 4 and a <i>y-<\/i>coordinate of 3, you have the ordered pair (4, 3).<\/p>\n<p>Let\u2019s look at another example.<\/p>\n<div class=\"bcc-box bcc-info\">\n<h3>Example<\/h3>\n<p>Describe the point shown as an ordered pair.<\/p>\n<p><img loading=\"lazy\" decoding=\"async\" class=\"aligncenter\" src=\"https:\/\/s3-us-west-2.amazonaws.com\/courses-images-archive-read-only\/wp-content\/uploads\/sites\/1468\/2016\/02\/04064229\/image004-1.jpg\" alt=\"A point that is 2 spaces above the x-axis and 5 spaces to the right of the y-axis.\" width=\"417\" height=\"378\" \/><\/p>\n<div class=\"qa-wrapper\" style=\"display: block\"><span class=\"show-answer collapsed\" style=\"cursor: pointer\" data-target=\"q668288\">Show Solution<\/span><\/p>\n<div id=\"q668288\" class=\"hidden-answer\" style=\"display: none\">\n<p>Begin at the origin and move along the <i>x-<\/i>axis. This is the <i>x-<\/i>coordinate and is written first in the ordered pair.<\/p>\n<p style=\"text-align: center\">(5, <i>y<\/i>)<\/p>\n<p>Move from 5 up to the ordered pair and read the number on the <i>y-<\/i>axis. This is the <i>y-<\/i>coordinate and is written second in the ordered pair.<\/p>\n<p style=\"text-align: center\">(5, 2)<\/p>\n<h4>Answer<\/h4>\n<p>The point shown as an ordered pair is (5, 2).<\/p><\/div>\n<\/div>\n<\/div>\n<h3>Describe the point shown as an ordered pair<\/h3>\n<p><iframe loading=\"lazy\" id=\"oembed-1\" title=\"Determine the Ordered Pairs for Points Plotted on the Coordinate Plane\" width=\"500\" height=\"281\" src=\"https:\/\/www.youtube.com\/embed\/c9WVU34MY5Q?feature=oembed&#38;rel=0\" frameborder=\"0\" allowfullscreen=\"allowfullscreen\"><\/iframe><\/p>\n<h3 id=\"Plotting Points in the Coordinate Plane\" class=\"no-indent\" style=\"text-align: left\">Plotting Points in the Coordinate Plane<\/h3>\n<p>Now that you know how to use the <i>x-<\/i> and <i>y-<\/i>axes, you can plot an ordered pair as well. Just remember, both processes start at the origin\u2014the beginning! The example that follows shows how to graph the ordered pair (1,3).<\/p>\n<div class=\"bcc-box bcc-info\">\n<h3>Example<\/h3>\n<p>Plot the point (1, 3).<\/p>\n<div class=\"qa-wrapper\" style=\"display: block\"><span class=\"show-answer collapsed\" style=\"cursor: pointer\" data-target=\"q28562\">Show Solution<\/span><\/p>\n<div id=\"q28562\" class=\"hidden-answer\" style=\"display: none\">\n<p>The <i>x-<\/i>coordinate is 1 because it comes first in the ordered pair. Start at the origin and move a distance of 1 unit in a positive direction (to the right) from the origin along the <i>x-<\/i>axis.<\/p>\n<p>The <i>y-<\/i>coordinate is 3 because it comes second in the ordered pair. From here move directly 3 units in a positive direction (up). If you look over to the <i>y-<\/i>axis, you should be lined up with 3 on that axis.<\/p>\n<h4>Answer<\/h4>\n<p>Draw a point at this location and label the point (1, 3).<img loading=\"lazy\" decoding=\"async\" class=\"aligncenter\" src=\"https:\/\/s3-us-west-2.amazonaws.com\/courses-images-archive-read-only\/wp-content\/uploads\/sites\/1468\/2016\/02\/04064232\/image005.jpg\" alt=\"Graph. A blue arrow goes from the origin (the point 0,0) to one unit to the right. A red arrow goes from the blue arrow to 3 units above the x-axis. That point is (1,3).\" width=\"417\" height=\"378\" \/><\/div>\n<\/div>\n<\/div>\n<p>In the previous example, both the <i>x-<\/i> and <i>y-<\/i>coordinates were positive. When one (or both) of the coordinates of an ordered pair is negative, you will need to move in the negative direction along one or both axes. Consider the example below in which both coordinates are negative.<\/p>\n<div class=\"bcc-box bcc-info\">\n<h3>Example<\/h3>\n<p>Plot the point [latex](\u22124,\u22122)[\/latex].<\/p>\n<p><img loading=\"lazy\" decoding=\"async\" class=\"aligncenter\" src=\"https:\/\/s3-us-west-2.amazonaws.com\/courses-images-archive-read-only\/wp-content\/uploads\/sites\/1468\/2016\/02\/04064233\/image006.jpg\" alt=\"Graph with blue arrow pointing from origin to four units to the left. A red arrow points down 2 spaces to the point negative 4, negative 2.\" width=\"417\" height=\"378\" \/><\/p>\n<p>The <i>x-<\/i>coordinate is [latex]\u22124[\/latex] because it comes first in the ordered pair. Start at the origin and move 4 units in a negative direction (left) along the <i>x-<\/i>axis.<\/p>\n<p>The <i>y-<\/i>coordinate is [latex]\u22122[\/latex] because it comes second in the ordered pair. Now move 2 units in a negative direction (down). If you look over to the <i>y-<\/i>axis, you should be lined up with [latex]\u22122[\/latex] on that axis.<\/p>\n<div class=\"qa-wrapper\" style=\"display: block\"><span class=\"show-answer collapsed\" style=\"cursor: pointer\" data-target=\"q118522\">Show Solution<\/span><\/p>\n<div id=\"q118522\" class=\"hidden-answer\" style=\"display: none\">Draw a point at this location and label the point [latex](\u22124,\u22122)[\/latex].<\/div>\n<\/div>\n<\/div>\n<p>The steps for plotting a point are summarized below.<\/p>\n<div class=\"textbox shaded\">\n<h3>Steps for Plotting an Ordered Pair (<i>x<\/i>, <i>y<\/i>) in the Coordinate Plane<\/h3>\n<ul>\n<li>Determine the <i>x-<\/i>coordinate. Beginning at the origin, move horizontally, the direction of the <i>x<\/i>-axis, the distance given by the <i>x-<\/i>coordinate. If the <i>x-<\/i>coordinate is positive, move to the right; if the <i>x-<\/i>coordinate is negative, move to the left.<\/li>\n<li>Determine the <i>y-<\/i>coordinate. Beginning at the <i>x-<\/i>coordinate, move vertically, the direction of the <i>y<\/i>-axis, the distance given by the <i>y-<\/i>coordinate. If the <i>y-<\/i>coordinate is positive, move up; if the <i>y-<\/i>coordinate is negative, move down.<\/li>\n<li>Draw a point at the ending location. Label the point with the ordered pair.<\/li>\n<\/ul>\n<\/div>\n<h3 id=\"video2\" class=\"no-indent\" style=\"text-align: left\">Plotting Points on the Coordinate Plane<\/h3>\n<p><iframe loading=\"lazy\" id=\"oembed-2\" title=\"Plot Points Given as Ordered Pairs on the Coordinate Plane\" width=\"500\" height=\"281\" src=\"https:\/\/www.youtube.com\/embed\/p_MESleS3mw?feature=oembed&#38;rel=0\" frameborder=\"0\" allowfullscreen=\"allowfullscreen\"><\/iframe><\/p>\n<h3 id=\"Introduction\" class=\"no-indent\" style=\"text-align: left\">Identify quadrants and use them to plot points<\/h3>\n<p>The intersecting <i>x-<\/i> and <i>y-<\/i>axes of the coordinate plane divide it&nbsp;into four sections. These four sections are called <b>quadrants<\/b>. Quadrants are named using the Roman numerals I, II, III, and IV beginning with the top right quadrant and moving counter clockwise.<\/p>\n<p>Ordered pairs within any particular quadrant share certain characteristics. Look at each quadrant in the graph below. What do you notice about the signs of the <i>x-<\/i> and <i>y-<\/i>coordinates of the points within each quadrant?<\/p>\n<p><img loading=\"lazy\" decoding=\"async\" class=\"aligncenter\" src=\"https:\/\/s3-us-west-2.amazonaws.com\/courses-images-archive-read-only\/wp-content\/uploads\/sites\/1468\/2016\/02\/04064235\/image008-1.jpg\" alt=\"A graph with many plotted points in different quadrants. Quadrant 1 has the point (1,3); the point (2,2); and the point (4,1). Quadrant 2 has the point negative 1, one; the point negative 2, 5; and the point negative 4, one. Quadrant 3 has the point negative 2, negative 3; the point negative 3, negative 3; and the point negative 1, negative 5. Quadrant 4 has the point 2, negative 1; the point 1, negative 3; and the point 4, negative 4.\" width=\"417\" height=\"378\" \/><\/p>\n<p>Within each quadrant, the signs of the <i>x-<\/i>coordinates and <i>y-<\/i>coordinates of each ordered pair are the same. They also follow a pattern, which is outlined in the table below.<\/p>\n<table>\n<thead>\n<tr>\n<th>Quadrant<\/th>\n<th>General Form of Point in this Quadrant<\/th>\n<th>Example<\/th>\n<th>Description<\/th>\n<\/tr>\n<\/thead>\n<tbody>\n<tr>\n<td>I<\/td>\n<td>[latex](+,+)[\/latex]<\/td>\n<td>[latex](5,4)[\/latex]<\/td>\n<td>Starting from the origin, go along the <i>x-<\/i>axis in a positive direction (right) and along the <i>y-<\/i>axis in a positive direction (up).<\/td>\n<\/tr>\n<tr>\n<td>II<\/td>\n<td>[latex](\u2212,+)[\/latex]<\/td>\n<td>[latex](\u22125,4)[\/latex]<\/td>\n<td>Starting from the origin, go along the <i>x-<\/i>axis in a negative direction (left) and along the <i>y-<\/i>axis in a positive direction (up).<\/td>\n<\/tr>\n<tr>\n<td>III<\/td>\n<td>[latex](\u2212,\u2212)[\/latex]<\/td>\n<td>[latex](\u22125,\u22124)[\/latex]<\/td>\n<td>Starting from the origin, go along the <i>x-<\/i>axis in a negative direction (left) and along the <i>y-<\/i>axis in a negative direction (down).<\/td>\n<\/tr>\n<tr>\n<td>IV<\/td>\n<td>[latex](+,\u2212)[\/latex]<\/td>\n<td>[latex](5,\u22124)[\/latex]<\/td>\n<td>Starting from the origin, go along the <i>x-<\/i>axis in a positive direction (right) and along the <i>y-<\/i>axis in a negative direction (down).<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n<p>Once you know about the quadrants in the coordinate plane, you can determine the quadrant of an ordered pair without even graphing it by looking at the chart above. Here\u2019s another way to think about it.<\/p>\n<p><img loading=\"lazy\" decoding=\"async\" class=\"aligncenter\" src=\"https:\/\/s3-us-west-2.amazonaws.com\/courses-images-archive-read-only\/wp-content\/uploads\/sites\/1468\/2016\/02\/04064237\/image009-1.jpg\" alt=\"Graph with quadrants. Quadrant 1 is positive, positive. Quadrant 2 is negative, positive. Quadrant 3 is negative, negative. Quadrant 4 is positive, negative.\" width=\"417\" height=\"378\" \/><\/p>\n<p>The example below details how to determine the quadrant location of a point just by thinking about the signs of its coordinates. Thinking about the quadrant location before plotting a point can help you prevent a mistake. It is also useful knowledge for checking that you have plotted a point correctly.<\/p>\n<div class=\"bcc-box bcc-info\">\n<h3>Example<\/h3>\n<p>In which quadrant is the point [latex](\u22127,10)[\/latex] located?<\/p>\n<div class=\"qa-wrapper\" style=\"display: block\"><span class=\"show-answer collapsed\" style=\"cursor: pointer\" data-target=\"q222353\">Show Solution<\/span><\/p>\n<div id=\"q222353\" class=\"hidden-answer\" style=\"display: none\">\n<p>Look at the signs of the <i>x-<\/i> and <i>y-<\/i>coordinates. For this ordered pair, the signs are [latex](\u2212,+)[\/latex].<\/p>\n<p style=\"text-align: center\">[latex](\u22127,10)[\/latex]<\/p>\n<p>Using the table or grid above, locate the pattern [latex](\u2212,+)[\/latex].<\/p>\n<p>Points with the pattern [latex](\u2212,+)[\/latex] are in Quadrant II.<\/p>\n<h4>Answer<\/h4>\n<p>The point [latex](\u22127,10)[\/latex] is in Quadrant II.<\/p><\/div>\n<\/div>\n<\/div>\n<div class=\"bcc-box bcc-info\">\n<h3>Example<\/h3>\n<p>In which quadrant is the point [latex](\u221210,\u22125)[\/latex] located?<\/p>\n<div class=\"qa-wrapper\" style=\"display: block\"><span class=\"show-answer collapsed\" style=\"cursor: pointer\" data-target=\"q999799\">Show Solution<\/span><\/p>\n<div id=\"q999799\" class=\"hidden-answer\" style=\"display: none\">\n<p>Look at the signs of the <i>x-<\/i> and <i>y-<\/i>coordinates. For this ordered pair, the signs are [latex](\u2212,\u2212)[\/latex].<\/p>\n<p style=\"text-align: center\">[latex](\u221210,\u22125)[\/latex]<\/p>\n<p>Points with the pattern [latex](\u2212,\u2212)[\/latex] are in Quadrant III.<\/p>\n<p>Using the table or grid above, locate the pattern [latex](\u2212,\u2212)[\/latex].<\/p>\n<h4>Answer<\/h4>\n<p>The point [latex](\u221210,\u22125)[\/latex] is in Quadrant III.<\/p><\/div>\n<\/div>\n<\/div>\n<p>What happens if an ordered pair has an <em>x<\/em>&#8211; or <i>y-<\/i>coordinate of zero? The example below shows the graph of the ordered pair [latex](0,4)[\/latex].<\/p>\n<p><img loading=\"lazy\" decoding=\"async\" class=\"aligncenter\" src=\"https:\/\/s3-us-west-2.amazonaws.com\/courses-images-archive-read-only\/wp-content\/uploads\/sites\/1468\/2016\/02\/04064238\/image010-1.jpg\" alt=\"Graph of the point (0,4). The point is on the y-axis.\" width=\"417\" height=\"378\" \/><\/p>\n<p>A point located on one of the axes is not considered to be in a quadrant. It is simply on one of the axes. Whenever the <i>x-<\/i>coordinate is 0, the point is located on the <i>y-<\/i>axis. Similarly, any point that has a <i>y-<\/i>coordinate of 0 will be located on the <i>x-<\/i>axis.<\/p>\n<h3 id=\"video1\">Identify quadrants and use them to plot points<\/h3>\n<p><iframe loading=\"lazy\" id=\"oembed-3\" title=\"Identify the Quadrant of a Point on the Coordinate Plane\" width=\"500\" height=\"281\" src=\"https:\/\/www.youtube.com\/embed\/iTsJsPgcE4E?feature=oembed&#38;rel=0\" frameborder=\"0\" allowfullscreen=\"allowfullscreen\"><\/iframe><\/p>\n<h2>Summary<\/h2>\n<p>The coordinate plane is a system for graphing and describing points and lines. The coordinate plane is comprised of a horizontal (<i>x<\/i>-) axis and a vertical (<i>y-<\/i>) axis. The intersection of these lines creates the origin, which is the point [latex](0,0)[\/latex]. The coordinate plane is split into four quadrants. Together, these features of the coordinate system allow for the graphical representation and communication about points, lines, and other algebraic concepts.<\/p>\n\n\t\t\t <section class=\"citations-section\" role=\"contentinfo\">\n\t\t\t <h3>Candela Citations<\/h3>\n\t\t\t\t\t <div>\n\t\t\t\t\t\t <div id=\"citation-list-4661\">\n\t\t\t\t\t\t\t <div class=\"licensing\"><div class=\"license-attribution-dropdown-subheading\">CC licensed content, Original<\/div><ul class=\"citation-list\"><li>Revision and Adaptation. <strong>Provided by<\/strong>: Lumen Learning. <strong>License<\/strong>: <em><a target=\"_blank\" rel=\"license\" href=\"https:\/\/creativecommons.org\/licenses\/by\/4.0\/\">CC BY: Attribution<\/a><\/em><\/li><li>Revision and Adaptation. <strong>Provided by<\/strong>: Lumen Learning. <strong>License<\/strong>: <em><a target=\"_blank\" rel=\"license\" href=\"https:\/\/creativecommons.org\/licenses\/by\/4.0\/\">CC BY: Attribution<\/a><\/em><\/li><\/ul><div class=\"license-attribution-dropdown-subheading\">CC licensed content, Shared previously<\/div><ul class=\"citation-list\"><li>Determine the Ordered Pairs for Points Plotted on the Coordinate Plane. <strong>Authored by<\/strong>: James Sousa (Mathispower4u.com) . <strong>Located at<\/strong>: <a target=\"_blank\" href=\"https:\/\/youtu.be\/c9WVU34MY5Q\">https:\/\/youtu.be\/c9WVU34MY5Q<\/a>. <strong>License<\/strong>: <em><a target=\"_blank\" rel=\"license\" href=\"https:\/\/creativecommons.org\/licenses\/by\/4.0\/\">CC BY: Attribution<\/a><\/em><\/li><li>Plot Points Given as Ordered Pairs on the Coordinate Plane. <strong>Authored by<\/strong>: James Sousa (Mathispower4u.com) . <strong>Located at<\/strong>: <a target=\"_blank\" href=\"https:\/\/youtu.be\/p_MESleS3mw\">https:\/\/youtu.be\/p_MESleS3mw<\/a>. <strong>License<\/strong>: <em><a target=\"_blank\" rel=\"license\" href=\"https:\/\/creativecommons.org\/licenses\/by\/4.0\/\">CC BY: Attribution<\/a><\/em><\/li><li>Unit 10: Solving Equations and Inequalities, from Developmental Math: An Open Program. <strong>Provided by<\/strong>: Monterey Institute of Technology and Education. <strong>Located at<\/strong>: <a target=\"_blank\" href=\"http:\/\/nrocnetwork.org\/resources\/downloads\/nroc-math-open-textbook-units-1-12-pdf-and-word-formats\/\">http:\/\/nrocnetwork.org\/resources\/downloads\/nroc-math-open-textbook-units-1-12-pdf-and-word-formats\/<\/a>. <strong>License<\/strong>: <em><a target=\"_blank\" rel=\"license\" href=\"https:\/\/creativecommons.org\/licenses\/by\/4.0\/\">CC BY: Attribution<\/a><\/em><\/li><li>Identify the Quadrant of a Point on the Coordinate Plane. <strong>Authored by<\/strong>: James Sousa (Mathispower4u.com) . <strong>Located at<\/strong>: <a target=\"_blank\" href=\"https:\/\/youtu.be\/iTsJsPgcE4E\">https:\/\/youtu.be\/iTsJsPgcE4E<\/a>. <strong>License<\/strong>: <em><a target=\"_blank\" rel=\"license\" href=\"https:\/\/creativecommons.org\/licenses\/by\/4.0\/\">CC BY: Attribution<\/a><\/em><\/li><\/ul><\/div>\n\t\t\t\t\t\t <\/div>\n\t\t\t\t\t <\/div>\n\t\t\t <\/section>","protected":false},"author":17533,"menu_order":4,"template":"","meta":{"_candela_citation":"[{\"type\":\"cc\",\"description\":\"Determine the Ordered Pairs for Points Plotted on the Coordinate Plane\",\"author\":\"James Sousa (Mathispower4u.com) \",\"organization\":\"\",\"url\":\"https:\/\/youtu.be\/c9WVU34MY5Q\",\"project\":\"\",\"license\":\"cc-by\",\"license_terms\":\"\"},{\"type\":\"cc\",\"description\":\"Plot Points Given as Ordered Pairs on the Coordinate Plane\",\"author\":\"James Sousa (Mathispower4u.com) \",\"organization\":\"\",\"url\":\"https:\/\/youtu.be\/p_MESleS3mw\",\"project\":\"\",\"license\":\"cc-by\",\"license_terms\":\"\"},{\"type\":\"cc\",\"description\":\"Unit 10: Solving Equations and Inequalities, from Developmental Math: An Open Program\",\"author\":\"\",\"organization\":\"Monterey Institute of Technology and Education\",\"url\":\"http:\/\/nrocnetwork.org\/resources\/downloads\/nroc-math-open-textbook-units-1-12-pdf-and-word-formats\/\",\"project\":\"\",\"license\":\"cc-by\",\"license_terms\":\"\"},{\"type\":\"original\",\"description\":\"Revision and Adaptation\",\"author\":\"\",\"organization\":\"Lumen Learning\",\"url\":\"\",\"project\":\"\",\"license\":\"cc-by\",\"license_terms\":\"\"},{\"type\":\"cc\",\"description\":\"Identify the Quadrant of a Point on the Coordinate Plane\",\"author\":\"James Sousa (Mathispower4u.com) \",\"organization\":\"\",\"url\":\"https:\/\/youtu.be\/iTsJsPgcE4E\",\"project\":\"\",\"license\":\"cc-by\",\"license_terms\":\"\"},{\"type\":\"original\",\"description\":\"Revision and Adaptation\",\"author\":\"\",\"organization\":\"Lumen Learning\",\"url\":\"\",\"project\":\"\",\"license\":\"cc-by\",\"license_terms\":\"\"}]","CANDELA_OUTCOMES_GUID":"","pb_show_title":"on","pb_short_title":"","pb_subtitle":"","pb_authors":[],"pb_section_license":""},"chapter-type":[],"contributor":[],"license":[],"class_list":["post-4661","chapter","type-chapter","status-web-only","hentry"],"part":4657,"_links":{"self":[{"href":"https:\/\/courses.lumenlearning.com\/slcc-mathforliberalartscorequisite\/wp-json\/pressbooks\/v2\/chapters\/4661","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/courses.lumenlearning.com\/slcc-mathforliberalartscorequisite\/wp-json\/pressbooks\/v2\/chapters"}],"about":[{"href":"https:\/\/courses.lumenlearning.com\/slcc-mathforliberalartscorequisite\/wp-json\/wp\/v2\/types\/chapter"}],"author":[{"embeddable":true,"href":"https:\/\/courses.lumenlearning.com\/slcc-mathforliberalartscorequisite\/wp-json\/wp\/v2\/users\/17533"}],"version-history":[{"count":1,"href":"https:\/\/courses.lumenlearning.com\/slcc-mathforliberalartscorequisite\/wp-json\/pressbooks\/v2\/chapters\/4661\/revisions"}],"predecessor-version":[{"id":5402,"href":"https:\/\/courses.lumenlearning.com\/slcc-mathforliberalartscorequisite\/wp-json\/pressbooks\/v2\/chapters\/4661\/revisions\/5402"}],"part":[{"href":"https:\/\/courses.lumenlearning.com\/slcc-mathforliberalartscorequisite\/wp-json\/pressbooks\/v2\/parts\/4657"}],"metadata":[{"href":"https:\/\/courses.lumenlearning.com\/slcc-mathforliberalartscorequisite\/wp-json\/pressbooks\/v2\/chapters\/4661\/metadata\/"}],"wp:attachment":[{"href":"https:\/\/courses.lumenlearning.com\/slcc-mathforliberalartscorequisite\/wp-json\/wp\/v2\/media?parent=4661"}],"wp:term":[{"taxonomy":"chapter-type","embeddable":true,"href":"https:\/\/courses.lumenlearning.com\/slcc-mathforliberalartscorequisite\/wp-json\/pressbooks\/v2\/chapter-type?post=4661"},{"taxonomy":"contributor","embeddable":true,"href":"https:\/\/courses.lumenlearning.com\/slcc-mathforliberalartscorequisite\/wp-json\/wp\/v2\/contributor?post=4661"},{"taxonomy":"license","embeddable":true,"href":"https:\/\/courses.lumenlearning.com\/slcc-mathforliberalartscorequisite\/wp-json\/wp\/v2\/license?post=4661"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}