{"id":10794,"date":"2015-07-10T21:02:04","date_gmt":"2015-07-10T21:02:04","guid":{"rendered":"https:\/\/courses.candelalearning.com\/osprecalc\/?post_type=chapter&#038;p=10794"},"modified":"2021-10-25T03:10:35","modified_gmt":"2021-10-25T03:10:35","slug":"functions-and-function-notation-problem-set","status":"publish","type":"chapter","link":"https:\/\/courses.lumenlearning.com\/ccbcmd-math-1\/chapter\/functions-and-function-notation-problem-set\/","title":{"raw":"Problem set: Functions and Function Notation","rendered":"Problem set: Functions and Function Notation"},"content":{"raw":"1. What is the difference between a relation and a function?\r\n\r\n2. What is the difference between the input and the output of a function?\r\n\r\n3. Why does the vertical line test tell us whether the graph of a relation represents a function?\r\n\r\n4. How can you determine if a relation is a one-to-one function?\r\n\r\n5. Why does the horizontal line test tell us whether the graph of a function is one-to-one?\r\n\r\nFor the following exercises, determine whether the relation represents a function.\r\n\r\n6. [latex]\\left\\{\\left(a,b\\right),\\text{ }\\left(c,d\\right),\\text{ }\\left(a,c\\right)\\right\\}[\/latex]\r\n\r\n7. [latex]\\left\\{\\left(a,b\\right),\\left(b,c\\right),\\left(c,c\\right)\\right\\}[\/latex]\r\n\r\n&nbsp;\r\n\r\nFor the following exercises, determine whether the relation represents [latex]y[\/latex] as a function of [latex]x[\/latex].\r\n\r\n8. [latex]5x+2y=10[\/latex]\r\n\r\n9. [latex]y={x}^{2}[\/latex]\r\n\r\n10. [latex]x={y}^{2}[\/latex]\r\n\r\n11. [latex]3{x}^{2}+y=14[\/latex]\r\n\r\n12. [latex]2x+{y}^{2}=6[\/latex]\r\n\r\n13. [latex]y=-2{x}^{2}+40x[\/latex]\r\n\r\n14. [latex]y=\\frac{1}{x}[\/latex]\r\n\r\n15. [latex]x=\\frac{3y+5}{7y - 1}[\/latex]\r\n\r\n16. [latex]x=\\sqrt{1-{y}^{2}}[\/latex]\r\n\r\n17. [latex]y=\\frac{3x+5}{7x - 1}[\/latex]\r\n\r\n18. [latex]{x}^{2}+{y}^{2}=9[\/latex]\r\n\r\n19. [latex]2xy=1[\/latex]\r\n\r\n20. [latex]x={y}^{3}[\/latex]\r\n\r\n21. [latex]y={x}^{3}[\/latex]\r\n\r\n22. [latex]y=\\sqrt{1-{x}^{2}}[\/latex]\r\n\r\n23. [latex]x=\\pm \\sqrt{1-y}[\/latex]\r\n\r\n24. [latex]y=\\pm \\sqrt{1-x}[\/latex]\r\n\r\n25. [latex]{y}^{2}={x}^{2}[\/latex]\r\n\r\n26. [latex]{y}^{3}={x}^{2}[\/latex]\r\n\r\nFor the following exercises, evaluate the function [latex]f[\/latex] at the indicated values [latex]\\text{ }f\\left(-3\\right),f\\left(2\\right),f\\left(-a\\right),-f\\left(a\\right),f\\left(a+h\\right)[\/latex].\r\n\r\n27. [latex]f\\left(x\\right)=2x - 5[\/latex]\r\n\r\n28. [latex]f\\left(x\\right)=-5{x}^{2}+2x - 1[\/latex]\r\n\r\n29. [latex]f\\left(x\\right)=\\sqrt{2-x}+5[\/latex]\r\n\r\n30. [latex]f\\left(x\\right)=\\frac{6x - 1}{5x+2}[\/latex]\r\n\r\n31. [latex]f\\left(x\\right)=|x - 1|-|x+1|[\/latex]\r\n\r\n32. Given the function [latex]g\\left(x\\right)=5-{x}^{2}[\/latex], evaluate [latex]\\frac{g\\left(x+h\\right)-g\\left(x\\right)}{h},h\\ne 0[\/latex].\r\n\r\n33. Given the function [latex]g\\left(x\\right)={x}^{2}+2x[\/latex], evaluate [latex]\\frac{g\\left(x\\right)-g\\left(a\\right)}{x-a},x\\ne a[\/latex].\r\n\r\n34. Given the function [latex]k\\left(t\\right)=2t - 1:[\/latex]\r\n<p style=\"padding-left: 60px;\">a. Evaluate [latex]k\\left(2\\right)[\/latex].\r\nb. Solve [latex]k\\left(t\\right)=7[\/latex].<\/p>\r\n35. Given the function [latex]f\\left(x\\right)=8 - 3x:[\/latex]\r\n<p style=\"padding-left: 60px;\">a. Evaluate [latex]f\\left(-2\\right)[\/latex].\r\nb. Solve [latex]f\\left(x\\right)=-1[\/latex].<\/p>\r\n36. Given the function [latex]p\\left(c\\right)={c}^{2}+c:[\/latex]\r\n<p style=\"padding-left: 60px;\">a. Evaluate [latex]p\\left(-3\\right)[\/latex].\r\nb. Solve [latex]p\\left(c\\right)=2[\/latex].<\/p>\r\n37. Given the function [latex]f\\left(x\\right)={x}^{2}-3x:[\/latex]\r\n<p style=\"padding-left: 60px;\">a. Evaluate [latex]f\\left(5\\right)[\/latex].\r\nb. Solve [latex]f\\left(x\\right)=4[\/latex].<\/p>\r\n38. Given the function [latex]f\\left(x\\right)=\\sqrt{x+2}:[\/latex]\r\n<p style=\"padding-left: 60px;\">a. Evaluate [latex]f\\left(7\\right)[\/latex].\r\nb. Solve [latex]f\\left(x\\right)=4[\/latex].<\/p>\r\n39. Consider the relationship [latex]3r+2t=18[\/latex].\r\n<p style=\"padding-left: 60px;\">a. Write the relationship as a function [latex]r=f\\left(t\\right)[\/latex].\r\nb. Evaluate [latex]f\\left(-3\\right)[\/latex].\r\nc. Solve [latex]f\\left(t\\right)=2[\/latex].<\/p>\r\nFor the following exercises, use the vertical line test to determine which graphs show relations that are functions.\r\n\r\n40.\r\n\r\n<img src=\"https:\/\/s3-us-west-2.amazonaws.com\/courses-images-archive-read-only\/wp-content\/uploads\/sites\/1227\/2015\/04\/03005021\/CNX_Precalc_Figure_01_01_201.jpg\" alt=\"Graph of relation.\" \/>\r\n\r\n41.\r\n\r\n<img src=\"https:\/\/s3-us-west-2.amazonaws.com\/courses-images-archive-read-only\/wp-content\/uploads\/sites\/1227\/2015\/04\/03005022\/CNX_Precalc_Figure_01_01_202.jpg\" alt=\"Graph of relation.\" \/>\r\n\r\n42.\r\n\r\n<img src=\"https:\/\/s3-us-west-2.amazonaws.com\/courses-images-archive-read-only\/wp-content\/uploads\/sites\/1227\/2015\/04\/03005022\/CNX_Precalc_Figure_01_01_203.jpg\" alt=\"Graph of relation.\" \/>\r\n\r\n43.\r\n\r\n<img src=\"https:\/\/s3-us-west-2.amazonaws.com\/courses-images-archive-read-only\/wp-content\/uploads\/sites\/1227\/2015\/04\/03005022\/CNX_Precalc_Figure_01_01_204.jpg\" alt=\"Graph of relation.\" \/>\r\n\r\n44.\r\n\r\n<img src=\"https:\/\/s3-us-west-2.amazonaws.com\/courses-images-archive-read-only\/wp-content\/uploads\/sites\/1227\/2015\/04\/03005024\/CNX_Precalc_Figure_01_01_205.jpg\" alt=\"Graph of relation.\" \/>\r\n\r\n45.\r\n\r\n<img src=\"https:\/\/s3-us-west-2.amazonaws.com\/courses-images-archive-read-only\/wp-content\/uploads\/sites\/1227\/2015\/04\/03005025\/CNX_Precalc_Figure_01_01_206.jpg\" alt=\"Graph of relation.\" \/>\r\n\r\n46.\r\n\r\n<img src=\"https:\/\/s3-us-west-2.amazonaws.com\/courses-images-archive-read-only\/wp-content\/uploads\/sites\/1227\/2015\/04\/03005025\/CNX_Precalc_Figure_01_01_207.jpg\" alt=\"Graph of relation.\" \/>\r\n\r\n47.\r\n\r\n<img src=\"https:\/\/s3-us-west-2.amazonaws.com\/courses-images-archive-read-only\/wp-content\/uploads\/sites\/1227\/2015\/04\/03005025\/CNX_Precalc_Figure_01_01_208.jpg\" alt=\"Graph of relation.\" \/>\r\n\r\n48.\r\n\r\n<img src=\"https:\/\/s3-us-west-2.amazonaws.com\/courses-images-archive-read-only\/wp-content\/uploads\/sites\/1227\/2015\/04\/03005026\/CNX_Precalc_Figure_01_01_209.jpg\" alt=\"Graph of relation.\" \/>\r\n\r\n49.\r\n\r\n<img src=\"https:\/\/s3-us-west-2.amazonaws.com\/courses-images-archive-read-only\/wp-content\/uploads\/sites\/1227\/2015\/04\/03005026\/CNX_Precalc_Figure_01_01_210.jpg\" alt=\"Graph of relation.\" \/>\r\n\r\n50.\r\n\r\n<img src=\"https:\/\/s3-us-west-2.amazonaws.com\/courses-images-archive-read-only\/wp-content\/uploads\/sites\/1227\/2015\/04\/03005026\/CNX_Precalc_Figure_01_01_211.jpg\" alt=\"Graph of relation.\" \/>\r\n\r\n51.\r\n\r\n<img src=\"https:\/\/s3-us-west-2.amazonaws.com\/courses-images-archive-read-only\/wp-content\/uploads\/sites\/1227\/2015\/04\/03005026\/CNX_Precalc_Figure_01_01_212.jpg\" alt=\"Graph of relation.\" \/>\r\n\r\n52.\u00a0Given the following graph,\r\n<p style=\"padding-left: 60px;\">a. Evaluate [latex]f\\left(-1\\right)[\/latex].\r\nb. Solve for [latex]f\\left(x\\right)=3[\/latex].<\/p>\r\n<img src=\"https:\/\/s3-us-west-2.amazonaws.com\/courses-images-archive-read-only\/wp-content\/uploads\/sites\/1227\/2015\/04\/03005027\/CNX_Precalc_Figure_01_01_213.jpg\" alt=\"Graph of relation.\" \/>\r\n\r\n53.\u00a0Given the following graph,\r\n<p style=\"padding-left: 60px;\">a. Evaluate [latex]f\\left(0\\right)[\/latex].\r\nb. Solve for [latex]f\\left(x\\right)=-3[\/latex].<\/p>\r\n<img src=\"https:\/\/s3-us-west-2.amazonaws.com\/courses-images-archive-read-only\/wp-content\/uploads\/sites\/1227\/2015\/04\/03005027\/CNX_Precalc_Figure_01_01_214.jpg\" alt=\"Graph of relation.\" \/>\r\n\r\n54. Given the following graph,\r\n<p style=\"padding-left: 60px;\">a. Evaluate [latex]f\\left(4\\right)[\/latex].\r\nb. Solve for [latex]f\\left(x\\right)=1[\/latex].<\/p>\r\n<img src=\"https:\/\/s3-us-west-2.amazonaws.com\/courses-images-archive-read-only\/wp-content\/uploads\/sites\/1227\/2015\/04\/03005027\/CNX_Precalc_Figure_01_01_215.jpg\" alt=\"Graph of relation.\" \/>\r\n\r\nFor the following exercises, determine if the given graph is a one-to-one function.\r\n\r\n55.\r\n\r\n<img src=\"https:\/\/s3-us-west-2.amazonaws.com\/courses-images-archive-read-only\/wp-content\/uploads\/sites\/1227\/2015\/04\/03005028\/CNX_Precalc_Figure_01_01_216.jpg\" alt=\"Graph of a circle.\" \/>\r\n\r\n56.\r\n\r\n<img src=\"https:\/\/s3-us-west-2.amazonaws.com\/courses-images-archive-read-only\/wp-content\/uploads\/sites\/1227\/2015\/04\/03005028\/CNX_Precalc_Figure_01_01_232.jpg\" alt=\"Graph of a parabola.\" \/>\r\n\r\n57.\r\n\r\n<img src=\"https:\/\/s3-us-west-2.amazonaws.com\/courses-images-archive-read-only\/wp-content\/uploads\/sites\/1227\/2015\/04\/03005028\/CNX_Precalc_Figure_01_01_217.jpg\" alt=\"Graph of a rotated cubic function.\" \/>\r\n\r\n58.\r\n\r\n<img src=\"https:\/\/s3-us-west-2.amazonaws.com\/courses-images-archive-read-only\/wp-content\/uploads\/sites\/1227\/2015\/04\/03005028\/CNX_Precalc_Figure_01_01_218.jpg\" alt=\"Graph of half of 1\/x.\" \/>\r\n\r\n59.\r\n\r\n<img src=\"https:\/\/s3-us-west-2.amazonaws.com\/courses-images-archive-read-only\/wp-content\/uploads\/sites\/1227\/2015\/04\/03005029\/CNX_Precalc_Figure_01_01_233.jpg\" alt=\"Graph of a one-to-one function.\" \/>\r\n\r\nFor the following exercises, determine whether the relation represents a function.\r\n\r\n60. [latex]\\left\\{\\left(-1,-1\\right),\\left(-2,-2\\right),\\left(-3,-3\\right)\\right\\}[\/latex]\r\n\r\n61. [latex]\\left\\{\\left(3,4\\right),\\left(4,5\\right),\\left(5,6\\right)\\right\\}[\/latex]\r\n\r\n62. [latex]\\left\\{\\left(2,5\\right),\\left(7,11\\right),\\left(15,8\\right),\\left(7,9\\right)\\right\\}[\/latex]\r\n\r\nFor the following exercises, determine if the relation represented in table form represents [latex]y[\/latex] as a function of [latex]x[\/latex].\r\n\r\n63.\r\n<table id=\"fs-id1165137644806\" class=\"unnumbered\" summary=\"..\"><colgroup> <col \/> <col \/> <col \/> <col \/><\/colgroup>\r\n<tbody>\r\n<tr>\r\n<td><strong>[latex]x[\/latex]<\/strong><\/td>\r\n<td>5<\/td>\r\n<td>10<\/td>\r\n<td>15<\/td>\r\n<\/tr>\r\n<tr>\r\n<td><strong>[latex]y[\/latex]<\/strong><\/td>\r\n<td>3<\/td>\r\n<td>8<\/td>\r\n<td>14<\/td>\r\n<\/tr>\r\n<\/tbody>\r\n<\/table>\r\n64.\r\n<div id=\"fs-id1165137771740\" class=\"exercise\">\r\n<div id=\"fs-id1165137771742\" class=\"problem\">\r\n<table id=\"fs-id1165137771744\" class=\"unnumbered\" summary=\"..\"><colgroup> <col \/> <col \/> <col \/> <col \/><\/colgroup>\r\n<tbody>\r\n<tr>\r\n<td><strong>[latex]x[\/latex]<\/strong><\/td>\r\n<td>5<\/td>\r\n<td>10<\/td>\r\n<td>15<\/td>\r\n<\/tr>\r\n<tr>\r\n<td><strong>[latex]y[\/latex]<\/strong><\/td>\r\n<td>3<\/td>\r\n<td>8<\/td>\r\n<td>8<\/td>\r\n<\/tr>\r\n<\/tbody>\r\n<\/table>\r\n65.\r\n\r\n<\/div>\r\n<\/div>\r\n<div id=\"fs-id1165137758640\" class=\"exercise\">\r\n<div id=\"fs-id1165137758643\" class=\"problem\">\r\n<table id=\"fs-id1165137758645\" class=\"unnumbered\" summary=\"..\"><colgroup> <col \/> <col \/> <col \/> <col \/><\/colgroup>\r\n<tbody>\r\n<tr>\r\n<td><strong>[latex]x[\/latex]<\/strong><\/td>\r\n<td>5<\/td>\r\n<td>10<\/td>\r\n<td>10<\/td>\r\n<\/tr>\r\n<tr>\r\n<td><strong>[latex]y[\/latex]<\/strong><\/td>\r\n<td>3<\/td>\r\n<td>8<\/td>\r\n<td>14<\/td>\r\n<\/tr>\r\n<\/tbody>\r\n<\/table>\r\nFor the following exercises, use the function [latex]f[\/latex] represented in the table below.\r\n<table id=\"fs-id1165137727218\" summary=\"..\">\r\n<tbody>\r\n<tr>\r\n<td><strong>[latex]x[\/latex]<\/strong><\/td>\r\n<td><strong>[latex]f\\left(x\\right)[\/latex] <\/strong><\/td>\r\n<\/tr>\r\n<tr>\r\n<td>0<\/td>\r\n<td>74<\/td>\r\n<\/tr>\r\n<tr>\r\n<td>1<\/td>\r\n<td>28<\/td>\r\n<\/tr>\r\n<tr>\r\n<td>2<\/td>\r\n<td>1<\/td>\r\n<\/tr>\r\n<tr>\r\n<td>3<\/td>\r\n<td>53<\/td>\r\n<\/tr>\r\n<tr>\r\n<td>4<\/td>\r\n<td>56<\/td>\r\n<\/tr>\r\n<tr>\r\n<td>5<\/td>\r\n<td>3<\/td>\r\n<\/tr>\r\n<tr>\r\n<td>6<\/td>\r\n<td>36<\/td>\r\n<\/tr>\r\n<tr>\r\n<td>7<\/td>\r\n<td>45<\/td>\r\n<\/tr>\r\n<tr>\r\n<td>8<\/td>\r\n<td>14<\/td>\r\n<\/tr>\r\n<tr>\r\n<td>9<\/td>\r\n<td>47<\/td>\r\n<\/tr>\r\n<\/tbody>\r\n<\/table>\r\n66. Evaluate [latex]f\\left(3\\right)[\/latex].\r\n\r\n67. Solve [latex]f\\left(x\\right)=1[\/latex].\r\n\r\nFor the following exercises, evaluate the function [latex]f[\/latex] at the values\u00a0[latex]f\\left(-2\\right),f\\left(-1\\right),f\\left(0\\right),f\\left(1\\right)[\/latex], and [latex]f\\left(2\\right)[\/latex].\r\n\r\n68. [latex]f\\left(x\\right)=4 - 2x[\/latex]\r\n\r\n69. [latex]f\\left(x\\right)=8 - 3x[\/latex]\r\n\r\n70. [latex]f\\left(x\\right)=8{x}^{2}-7x+3[\/latex]\r\n\r\n71. [latex]f\\left(x\\right)=3+\\sqrt{x+3}[\/latex]\r\n\r\n72. [latex]f\\left(x\\right)=\\frac{x - 2}{x+3}[\/latex]\r\n\r\n73. [latex]f\\left(x\\right)={3}^{x}[\/latex]\r\n\r\nFor the following exercises, evaluate the expressions, given functions [latex]f,g[\/latex], and [latex]h:[\/latex]\r\n<ul>\r\n \t<li>[latex]f\\left(x\\right)=3x - 2[\/latex]<\/li>\r\n \t<li>[latex]g\\left(x\\right)=5-{x}^{2}[\/latex]<\/li>\r\n \t<li>[latex]h\\left(x\\right)=-2{x}^{2}+3x - 1[\/latex]<\/li>\r\n<\/ul>\r\n74. [latex]3f\\left(1\\right)-4g\\left(-2\\right)[\/latex]\r\n\r\n75. [latex]f\\left(\\frac{7}{3}\\right)-h\\left(-2\\right)[\/latex]\r\n<h4>Applications<\/h4>\r\n76. The amount of garbage, [latex]G[\/latex], produced by a city with population [latex]p[\/latex] is given by [latex]G=f\\left(p\\right)[\/latex]. [latex]G[\/latex] is measured in tons per week, and [latex]p[\/latex] is measured in thousands of people.\r\n<p style=\"padding-left: 60px;\">a. The town of Tola has a population of 40,000 and produces 13 tons of garbage each week. Express this information in terms of the function [latex]f[\/latex].\r\nb. Explain the meaning of the statement [latex]f\\left(5\\right)=2[\/latex].<\/p>\r\n77. The number of cubic yards of dirt, [latex]D[\/latex], needed to cover a garden with area [latex]a[\/latex] square feet is given by [latex]D=g\\left(a\\right)[\/latex].\r\n<p style=\"padding-left: 60px;\">a. A garden with area 5000 ft2 requires 50 yd3 of dirt. Express this information in terms of the function [latex]g[\/latex].\r\nb. Explain the meaning of the statement [latex]g\\left(100\\right)=1[\/latex].<\/p>\r\n78. Let [latex]f\\left(t\\right)[\/latex] be the number of ducks in a lake [latex]t[\/latex] years after 1990. Explain the meaning of each statement:\r\n<p style=\"padding-left: 60px;\">a. [latex]f\\left(5\\right)=30[\/latex]\r\nb. [latex]f\\left(10\\right)=40[\/latex]<\/p>\r\n79. Let [latex]h\\left(t\\right)[\/latex] be the height above ground, in feet, of a rocket [latex]t[\/latex] seconds after launching. Explain the meaning of each statement:\r\n<p style=\"padding-left: 60px;\">a. [latex]h\\left(1\\right)=200[\/latex]\r\nb. [latex]h\\left(2\\right)=350[\/latex]<\/p>\r\n80. Show that the function [latex]f\\left(x\\right)=3{\\left(x - 5\\right)}^{2}+7[\/latex] is <em>not<\/em> one-to-one.\r\n\r\n<span style=\"color: #0000ff;\"><em>See the next page for the solutions\u00a0to the odd-numbered problems.<\/em><\/span>\r\n\r\n<\/div>\r\n<\/div>","rendered":"<p>1. What is the difference between a relation and a function?<\/p>\n<p>2. What is the difference between the input and the output of a function?<\/p>\n<p>3. Why does the vertical line test tell us whether the graph of a relation represents a function?<\/p>\n<p>4. How can you determine if a relation is a one-to-one function?<\/p>\n<p>5. Why does the horizontal line test tell us whether the graph of a function is one-to-one?<\/p>\n<p>For the following exercises, determine whether the relation represents a function.<\/p>\n<p>6. [latex]\\left\\{\\left(a,b\\right),\\text{ }\\left(c,d\\right),\\text{ }\\left(a,c\\right)\\right\\}[\/latex]<\/p>\n<p>7. [latex]\\left\\{\\left(a,b\\right),\\left(b,c\\right),\\left(c,c\\right)\\right\\}[\/latex]<\/p>\n<p>&nbsp;<\/p>\n<p>For the following exercises, determine whether the relation represents [latex]y[\/latex] as a function of [latex]x[\/latex].<\/p>\n<p>8. [latex]5x+2y=10[\/latex]<\/p>\n<p>9. [latex]y={x}^{2}[\/latex]<\/p>\n<p>10. [latex]x={y}^{2}[\/latex]<\/p>\n<p>11. [latex]3{x}^{2}+y=14[\/latex]<\/p>\n<p>12. [latex]2x+{y}^{2}=6[\/latex]<\/p>\n<p>13. [latex]y=-2{x}^{2}+40x[\/latex]<\/p>\n<p>14. [latex]y=\\frac{1}{x}[\/latex]<\/p>\n<p>15. [latex]x=\\frac{3y+5}{7y - 1}[\/latex]<\/p>\n<p>16. [latex]x=\\sqrt{1-{y}^{2}}[\/latex]<\/p>\n<p>17. [latex]y=\\frac{3x+5}{7x - 1}[\/latex]<\/p>\n<p>18. [latex]{x}^{2}+{y}^{2}=9[\/latex]<\/p>\n<p>19. [latex]2xy=1[\/latex]<\/p>\n<p>20. [latex]x={y}^{3}[\/latex]<\/p>\n<p>21. [latex]y={x}^{3}[\/latex]<\/p>\n<p>22. [latex]y=\\sqrt{1-{x}^{2}}[\/latex]<\/p>\n<p>23. [latex]x=\\pm \\sqrt{1-y}[\/latex]<\/p>\n<p>24. [latex]y=\\pm \\sqrt{1-x}[\/latex]<\/p>\n<p>25. [latex]{y}^{2}={x}^{2}[\/latex]<\/p>\n<p>26. [latex]{y}^{3}={x}^{2}[\/latex]<\/p>\n<p>For the following exercises, evaluate the function [latex]f[\/latex] at the indicated values [latex]\\text{ }f\\left(-3\\right),f\\left(2\\right),f\\left(-a\\right),-f\\left(a\\right),f\\left(a+h\\right)[\/latex].<\/p>\n<p>27. [latex]f\\left(x\\right)=2x - 5[\/latex]<\/p>\n<p>28. [latex]f\\left(x\\right)=-5{x}^{2}+2x - 1[\/latex]<\/p>\n<p>29. [latex]f\\left(x\\right)=\\sqrt{2-x}+5[\/latex]<\/p>\n<p>30. [latex]f\\left(x\\right)=\\frac{6x - 1}{5x+2}[\/latex]<\/p>\n<p>31. [latex]f\\left(x\\right)=|x - 1|-|x+1|[\/latex]<\/p>\n<p>32. Given the function [latex]g\\left(x\\right)=5-{x}^{2}[\/latex], evaluate [latex]\\frac{g\\left(x+h\\right)-g\\left(x\\right)}{h},h\\ne 0[\/latex].<\/p>\n<p>33. Given the function [latex]g\\left(x\\right)={x}^{2}+2x[\/latex], evaluate [latex]\\frac{g\\left(x\\right)-g\\left(a\\right)}{x-a},x\\ne a[\/latex].<\/p>\n<p>34. Given the function [latex]k\\left(t\\right)=2t - 1:[\/latex]<\/p>\n<p style=\"padding-left: 60px;\">a. Evaluate [latex]k\\left(2\\right)[\/latex].<br \/>\nb. Solve [latex]k\\left(t\\right)=7[\/latex].<\/p>\n<p>35. Given the function [latex]f\\left(x\\right)=8 - 3x:[\/latex]<\/p>\n<p style=\"padding-left: 60px;\">a. Evaluate [latex]f\\left(-2\\right)[\/latex].<br \/>\nb. Solve [latex]f\\left(x\\right)=-1[\/latex].<\/p>\n<p>36. Given the function [latex]p\\left(c\\right)={c}^{2}+c:[\/latex]<\/p>\n<p style=\"padding-left: 60px;\">a. Evaluate [latex]p\\left(-3\\right)[\/latex].<br \/>\nb. Solve [latex]p\\left(c\\right)=2[\/latex].<\/p>\n<p>37. Given the function [latex]f\\left(x\\right)={x}^{2}-3x:[\/latex]<\/p>\n<p style=\"padding-left: 60px;\">a. Evaluate [latex]f\\left(5\\right)[\/latex].<br \/>\nb. Solve [latex]f\\left(x\\right)=4[\/latex].<\/p>\n<p>38. Given the function [latex]f\\left(x\\right)=\\sqrt{x+2}:[\/latex]<\/p>\n<p style=\"padding-left: 60px;\">a. Evaluate [latex]f\\left(7\\right)[\/latex].<br \/>\nb. Solve [latex]f\\left(x\\right)=4[\/latex].<\/p>\n<p>39. Consider the relationship [latex]3r+2t=18[\/latex].<\/p>\n<p style=\"padding-left: 60px;\">a. Write the relationship as a function [latex]r=f\\left(t\\right)[\/latex].<br \/>\nb. Evaluate [latex]f\\left(-3\\right)[\/latex].<br \/>\nc. Solve [latex]f\\left(t\\right)=2[\/latex].<\/p>\n<p>For the following exercises, use the vertical line test to determine which graphs show relations that are functions.<\/p>\n<p>40.<\/p>\n<p><img decoding=\"async\" src=\"https:\/\/s3-us-west-2.amazonaws.com\/courses-images-archive-read-only\/wp-content\/uploads\/sites\/1227\/2015\/04\/03005021\/CNX_Precalc_Figure_01_01_201.jpg\" alt=\"Graph of relation.\" \/><\/p>\n<p>41.<\/p>\n<p><img decoding=\"async\" src=\"https:\/\/s3-us-west-2.amazonaws.com\/courses-images-archive-read-only\/wp-content\/uploads\/sites\/1227\/2015\/04\/03005022\/CNX_Precalc_Figure_01_01_202.jpg\" alt=\"Graph of relation.\" \/><\/p>\n<p>42.<\/p>\n<p><img decoding=\"async\" src=\"https:\/\/s3-us-west-2.amazonaws.com\/courses-images-archive-read-only\/wp-content\/uploads\/sites\/1227\/2015\/04\/03005022\/CNX_Precalc_Figure_01_01_203.jpg\" alt=\"Graph of relation.\" \/><\/p>\n<p>43.<\/p>\n<p><img decoding=\"async\" src=\"https:\/\/s3-us-west-2.amazonaws.com\/courses-images-archive-read-only\/wp-content\/uploads\/sites\/1227\/2015\/04\/03005022\/CNX_Precalc_Figure_01_01_204.jpg\" alt=\"Graph of relation.\" \/><\/p>\n<p>44.<\/p>\n<p><img decoding=\"async\" src=\"https:\/\/s3-us-west-2.amazonaws.com\/courses-images-archive-read-only\/wp-content\/uploads\/sites\/1227\/2015\/04\/03005024\/CNX_Precalc_Figure_01_01_205.jpg\" alt=\"Graph of relation.\" \/><\/p>\n<p>45.<\/p>\n<p><img decoding=\"async\" src=\"https:\/\/s3-us-west-2.amazonaws.com\/courses-images-archive-read-only\/wp-content\/uploads\/sites\/1227\/2015\/04\/03005025\/CNX_Precalc_Figure_01_01_206.jpg\" alt=\"Graph of relation.\" \/><\/p>\n<p>46.<\/p>\n<p><img decoding=\"async\" src=\"https:\/\/s3-us-west-2.amazonaws.com\/courses-images-archive-read-only\/wp-content\/uploads\/sites\/1227\/2015\/04\/03005025\/CNX_Precalc_Figure_01_01_207.jpg\" alt=\"Graph of relation.\" \/><\/p>\n<p>47.<\/p>\n<p><img decoding=\"async\" src=\"https:\/\/s3-us-west-2.amazonaws.com\/courses-images-archive-read-only\/wp-content\/uploads\/sites\/1227\/2015\/04\/03005025\/CNX_Precalc_Figure_01_01_208.jpg\" alt=\"Graph of relation.\" \/><\/p>\n<p>48.<\/p>\n<p><img decoding=\"async\" src=\"https:\/\/s3-us-west-2.amazonaws.com\/courses-images-archive-read-only\/wp-content\/uploads\/sites\/1227\/2015\/04\/03005026\/CNX_Precalc_Figure_01_01_209.jpg\" alt=\"Graph of relation.\" \/><\/p>\n<p>49.<\/p>\n<p><img decoding=\"async\" src=\"https:\/\/s3-us-west-2.amazonaws.com\/courses-images-archive-read-only\/wp-content\/uploads\/sites\/1227\/2015\/04\/03005026\/CNX_Precalc_Figure_01_01_210.jpg\" alt=\"Graph of relation.\" \/><\/p>\n<p>50.<\/p>\n<p><img decoding=\"async\" src=\"https:\/\/s3-us-west-2.amazonaws.com\/courses-images-archive-read-only\/wp-content\/uploads\/sites\/1227\/2015\/04\/03005026\/CNX_Precalc_Figure_01_01_211.jpg\" alt=\"Graph of relation.\" \/><\/p>\n<p>51.<\/p>\n<p><img decoding=\"async\" src=\"https:\/\/s3-us-west-2.amazonaws.com\/courses-images-archive-read-only\/wp-content\/uploads\/sites\/1227\/2015\/04\/03005026\/CNX_Precalc_Figure_01_01_212.jpg\" alt=\"Graph of relation.\" \/><\/p>\n<p>52.\u00a0Given the following graph,<\/p>\n<p style=\"padding-left: 60px;\">a. Evaluate [latex]f\\left(-1\\right)[\/latex].<br \/>\nb. Solve for [latex]f\\left(x\\right)=3[\/latex].<\/p>\n<p><img decoding=\"async\" src=\"https:\/\/s3-us-west-2.amazonaws.com\/courses-images-archive-read-only\/wp-content\/uploads\/sites\/1227\/2015\/04\/03005027\/CNX_Precalc_Figure_01_01_213.jpg\" alt=\"Graph of relation.\" \/><\/p>\n<p>53.\u00a0Given the following graph,<\/p>\n<p style=\"padding-left: 60px;\">a. Evaluate [latex]f\\left(0\\right)[\/latex].<br \/>\nb. Solve for [latex]f\\left(x\\right)=-3[\/latex].<\/p>\n<p><img decoding=\"async\" src=\"https:\/\/s3-us-west-2.amazonaws.com\/courses-images-archive-read-only\/wp-content\/uploads\/sites\/1227\/2015\/04\/03005027\/CNX_Precalc_Figure_01_01_214.jpg\" alt=\"Graph of relation.\" \/><\/p>\n<p>54. Given the following graph,<\/p>\n<p style=\"padding-left: 60px;\">a. Evaluate [latex]f\\left(4\\right)[\/latex].<br \/>\nb. Solve for [latex]f\\left(x\\right)=1[\/latex].<\/p>\n<p><img decoding=\"async\" src=\"https:\/\/s3-us-west-2.amazonaws.com\/courses-images-archive-read-only\/wp-content\/uploads\/sites\/1227\/2015\/04\/03005027\/CNX_Precalc_Figure_01_01_215.jpg\" alt=\"Graph of relation.\" \/><\/p>\n<p>For the following exercises, determine if the given graph is a one-to-one function.<\/p>\n<p>55.<\/p>\n<p><img decoding=\"async\" src=\"https:\/\/s3-us-west-2.amazonaws.com\/courses-images-archive-read-only\/wp-content\/uploads\/sites\/1227\/2015\/04\/03005028\/CNX_Precalc_Figure_01_01_216.jpg\" alt=\"Graph of a circle.\" \/><\/p>\n<p>56.<\/p>\n<p><img decoding=\"async\" src=\"https:\/\/s3-us-west-2.amazonaws.com\/courses-images-archive-read-only\/wp-content\/uploads\/sites\/1227\/2015\/04\/03005028\/CNX_Precalc_Figure_01_01_232.jpg\" alt=\"Graph of a parabola.\" \/><\/p>\n<p>57.<\/p>\n<p><img decoding=\"async\" src=\"https:\/\/s3-us-west-2.amazonaws.com\/courses-images-archive-read-only\/wp-content\/uploads\/sites\/1227\/2015\/04\/03005028\/CNX_Precalc_Figure_01_01_217.jpg\" alt=\"Graph of a rotated cubic function.\" \/><\/p>\n<p>58.<\/p>\n<p><img decoding=\"async\" src=\"https:\/\/s3-us-west-2.amazonaws.com\/courses-images-archive-read-only\/wp-content\/uploads\/sites\/1227\/2015\/04\/03005028\/CNX_Precalc_Figure_01_01_218.jpg\" alt=\"Graph of half of 1\/x.\" \/><\/p>\n<p>59.<\/p>\n<p><img decoding=\"async\" src=\"https:\/\/s3-us-west-2.amazonaws.com\/courses-images-archive-read-only\/wp-content\/uploads\/sites\/1227\/2015\/04\/03005029\/CNX_Precalc_Figure_01_01_233.jpg\" alt=\"Graph of a one-to-one function.\" \/><\/p>\n<p>For the following exercises, determine whether the relation represents a function.<\/p>\n<p>60. [latex]\\left\\{\\left(-1,-1\\right),\\left(-2,-2\\right),\\left(-3,-3\\right)\\right\\}[\/latex]<\/p>\n<p>61. [latex]\\left\\{\\left(3,4\\right),\\left(4,5\\right),\\left(5,6\\right)\\right\\}[\/latex]<\/p>\n<p>62. [latex]\\left\\{\\left(2,5\\right),\\left(7,11\\right),\\left(15,8\\right),\\left(7,9\\right)\\right\\}[\/latex]<\/p>\n<p>For the following exercises, determine if the relation represented in table form represents [latex]y[\/latex] as a function of [latex]x[\/latex].<\/p>\n<p>63.<\/p>\n<table id=\"fs-id1165137644806\" class=\"unnumbered\" summary=\"..\">\n<colgroup>\n<col \/>\n<col \/>\n<col \/>\n<col \/><\/colgroup>\n<tbody>\n<tr>\n<td><strong>[latex]x[\/latex]<\/strong><\/td>\n<td>5<\/td>\n<td>10<\/td>\n<td>15<\/td>\n<\/tr>\n<tr>\n<td><strong>[latex]y[\/latex]<\/strong><\/td>\n<td>3<\/td>\n<td>8<\/td>\n<td>14<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n<p>64.<\/p>\n<div id=\"fs-id1165137771740\" class=\"exercise\">\n<div id=\"fs-id1165137771742\" class=\"problem\">\n<table id=\"fs-id1165137771744\" class=\"unnumbered\" summary=\"..\">\n<colgroup>\n<col \/>\n<col \/>\n<col \/>\n<col \/><\/colgroup>\n<tbody>\n<tr>\n<td><strong>[latex]x[\/latex]<\/strong><\/td>\n<td>5<\/td>\n<td>10<\/td>\n<td>15<\/td>\n<\/tr>\n<tr>\n<td><strong>[latex]y[\/latex]<\/strong><\/td>\n<td>3<\/td>\n<td>8<\/td>\n<td>8<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n<p>65.<\/p>\n<\/div>\n<\/div>\n<div id=\"fs-id1165137758640\" class=\"exercise\">\n<div id=\"fs-id1165137758643\" class=\"problem\">\n<table id=\"fs-id1165137758645\" class=\"unnumbered\" summary=\"..\">\n<colgroup>\n<col \/>\n<col \/>\n<col \/>\n<col \/><\/colgroup>\n<tbody>\n<tr>\n<td><strong>[latex]x[\/latex]<\/strong><\/td>\n<td>5<\/td>\n<td>10<\/td>\n<td>10<\/td>\n<\/tr>\n<tr>\n<td><strong>[latex]y[\/latex]<\/strong><\/td>\n<td>3<\/td>\n<td>8<\/td>\n<td>14<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n<p>For the following exercises, use the function [latex]f[\/latex] represented in the table below.<\/p>\n<table id=\"fs-id1165137727218\" summary=\"..\">\n<tbody>\n<tr>\n<td><strong>[latex]x[\/latex]<\/strong><\/td>\n<td><strong>[latex]f\\left(x\\right)[\/latex] <\/strong><\/td>\n<\/tr>\n<tr>\n<td>0<\/td>\n<td>74<\/td>\n<\/tr>\n<tr>\n<td>1<\/td>\n<td>28<\/td>\n<\/tr>\n<tr>\n<td>2<\/td>\n<td>1<\/td>\n<\/tr>\n<tr>\n<td>3<\/td>\n<td>53<\/td>\n<\/tr>\n<tr>\n<td>4<\/td>\n<td>56<\/td>\n<\/tr>\n<tr>\n<td>5<\/td>\n<td>3<\/td>\n<\/tr>\n<tr>\n<td>6<\/td>\n<td>36<\/td>\n<\/tr>\n<tr>\n<td>7<\/td>\n<td>45<\/td>\n<\/tr>\n<tr>\n<td>8<\/td>\n<td>14<\/td>\n<\/tr>\n<tr>\n<td>9<\/td>\n<td>47<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n<p>66. Evaluate [latex]f\\left(3\\right)[\/latex].<\/p>\n<p>67. Solve [latex]f\\left(x\\right)=1[\/latex].<\/p>\n<p>For the following exercises, evaluate the function [latex]f[\/latex] at the values\u00a0[latex]f\\left(-2\\right),f\\left(-1\\right),f\\left(0\\right),f\\left(1\\right)[\/latex], and [latex]f\\left(2\\right)[\/latex].<\/p>\n<p>68. [latex]f\\left(x\\right)=4 - 2x[\/latex]<\/p>\n<p>69. [latex]f\\left(x\\right)=8 - 3x[\/latex]<\/p>\n<p>70. [latex]f\\left(x\\right)=8{x}^{2}-7x+3[\/latex]<\/p>\n<p>71. [latex]f\\left(x\\right)=3+\\sqrt{x+3}[\/latex]<\/p>\n<p>72. [latex]f\\left(x\\right)=\\frac{x - 2}{x+3}[\/latex]<\/p>\n<p>73. [latex]f\\left(x\\right)={3}^{x}[\/latex]<\/p>\n<p>For the following exercises, evaluate the expressions, given functions [latex]f,g[\/latex], and [latex]h:[\/latex]<\/p>\n<ul>\n<li>[latex]f\\left(x\\right)=3x - 2[\/latex]<\/li>\n<li>[latex]g\\left(x\\right)=5-{x}^{2}[\/latex]<\/li>\n<li>[latex]h\\left(x\\right)=-2{x}^{2}+3x - 1[\/latex]<\/li>\n<\/ul>\n<p>74. [latex]3f\\left(1\\right)-4g\\left(-2\\right)[\/latex]<\/p>\n<p>75. [latex]f\\left(\\frac{7}{3}\\right)-h\\left(-2\\right)[\/latex]<\/p>\n<h4>Applications<\/h4>\n<p>76. The amount of garbage, [latex]G[\/latex], produced by a city with population [latex]p[\/latex] is given by [latex]G=f\\left(p\\right)[\/latex]. [latex]G[\/latex] is measured in tons per week, and [latex]p[\/latex] is measured in thousands of people.<\/p>\n<p style=\"padding-left: 60px;\">a. The town of Tola has a population of 40,000 and produces 13 tons of garbage each week. Express this information in terms of the function [latex]f[\/latex].<br \/>\nb. Explain the meaning of the statement [latex]f\\left(5\\right)=2[\/latex].<\/p>\n<p>77. The number of cubic yards of dirt, [latex]D[\/latex], needed to cover a garden with area [latex]a[\/latex] square feet is given by [latex]D=g\\left(a\\right)[\/latex].<\/p>\n<p style=\"padding-left: 60px;\">a. A garden with area 5000 ft2 requires 50 yd3 of dirt. Express this information in terms of the function [latex]g[\/latex].<br \/>\nb. Explain the meaning of the statement [latex]g\\left(100\\right)=1[\/latex].<\/p>\n<p>78. Let [latex]f\\left(t\\right)[\/latex] be the number of ducks in a lake [latex]t[\/latex] years after 1990. Explain the meaning of each statement:<\/p>\n<p style=\"padding-left: 60px;\">a. [latex]f\\left(5\\right)=30[\/latex]<br \/>\nb. [latex]f\\left(10\\right)=40[\/latex]<\/p>\n<p>79. Let [latex]h\\left(t\\right)[\/latex] be the height above ground, in feet, of a rocket [latex]t[\/latex] seconds after launching. Explain the meaning of each statement:<\/p>\n<p style=\"padding-left: 60px;\">a. [latex]h\\left(1\\right)=200[\/latex]<br \/>\nb. [latex]h\\left(2\\right)=350[\/latex]<\/p>\n<p>80. Show that the function [latex]f\\left(x\\right)=3{\\left(x - 5\\right)}^{2}+7[\/latex] is <em>not<\/em> one-to-one.<\/p>\n<p><span style=\"color: #0000ff;\"><em>See the next page for the solutions\u00a0to the odd-numbered problems.<\/em><\/span><\/p>\n<\/div>\n<\/div>\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-10794\">\n\t\t\t\t\t\t\t <div class=\"licensing\"><div class=\"license-attribution-dropdown-subheading\">CC licensed content, Shared previously<\/div><ul class=\"citation-list\"><li>Precalculus. <strong>Authored by<\/strong>: Jay Abramson, et al.. <strong>Provided by<\/strong>: OpenStax. <strong>Located at<\/strong>: <a target=\"_blank\" href=\"http:\/\/cnx.org\/contents\/fd53eae1-fa23-47c7-bb1b-972349835c3c@5.175\">http:\/\/cnx.org\/contents\/fd53eae1-fa23-47c7-bb1b-972349835c3c@5.175<\/a>. <strong>License<\/strong>: <em><a target=\"_blank\" rel=\"license\" href=\"https:\/\/creativecommons.org\/licenses\/by\/4.0\/\">CC BY: Attribution<\/a><\/em>. <strong>License Terms<\/strong>: Download For Free at : http:\/\/cnx.org\/contents\/fd53eae1-fa23-47c7-bb1b-972349835c3c@5.175.<\/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":276,"menu_order":6,"template":"","meta":{"_candela_citation":"[{\"type\":\"cc\",\"description\":\"Precalculus\",\"author\":\"Jay Abramson, et al.\",\"organization\":\"OpenStax\",\"url\":\"http:\/\/cnx.org\/contents\/fd53eae1-fa23-47c7-bb1b-972349835c3c@5.175\",\"project\":\"\",\"license\":\"cc-by\",\"license_terms\":\"Download For Free at : http:\/\/cnx.org\/contents\/fd53eae1-fa23-47c7-bb1b-972349835c3c@5.175.\"}]","CANDELA_OUTCOMES_GUID":"","pb_show_title":"on","pb_short_title":"","pb_subtitle":"","pb_authors":[],"pb_section_license":""},"chapter-type":[],"contributor":[],"license":[],"class_list":["post-10794","chapter","type-chapter","status-publish","hentry"],"part":10705,"_links":{"self":[{"href":"https:\/\/courses.lumenlearning.com\/ccbcmd-math-1\/wp-json\/pressbooks\/v2\/chapters\/10794","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/courses.lumenlearning.com\/ccbcmd-math-1\/wp-json\/pressbooks\/v2\/chapters"}],"about":[{"href":"https:\/\/courses.lumenlearning.com\/ccbcmd-math-1\/wp-json\/wp\/v2\/types\/chapter"}],"author":[{"embeddable":true,"href":"https:\/\/courses.lumenlearning.com\/ccbcmd-math-1\/wp-json\/wp\/v2\/users\/276"}],"version-history":[{"count":15,"href":"https:\/\/courses.lumenlearning.com\/ccbcmd-math-1\/wp-json\/pressbooks\/v2\/chapters\/10794\/revisions"}],"predecessor-version":[{"id":15934,"href":"https:\/\/courses.lumenlearning.com\/ccbcmd-math-1\/wp-json\/pressbooks\/v2\/chapters\/10794\/revisions\/15934"}],"part":[{"href":"https:\/\/courses.lumenlearning.com\/ccbcmd-math-1\/wp-json\/pressbooks\/v2\/parts\/10705"}],"metadata":[{"href":"https:\/\/courses.lumenlearning.com\/ccbcmd-math-1\/wp-json\/pressbooks\/v2\/chapters\/10794\/metadata\/"}],"wp:attachment":[{"href":"https:\/\/courses.lumenlearning.com\/ccbcmd-math-1\/wp-json\/wp\/v2\/media?parent=10794"}],"wp:term":[{"taxonomy":"chapter-type","embeddable":true,"href":"https:\/\/courses.lumenlearning.com\/ccbcmd-math-1\/wp-json\/pressbooks\/v2\/chapter-type?post=10794"},{"taxonomy":"contributor","embeddable":true,"href":"https:\/\/courses.lumenlearning.com\/ccbcmd-math-1\/wp-json\/wp\/v2\/contributor?post=10794"},{"taxonomy":"license","embeddable":true,"href":"https:\/\/courses.lumenlearning.com\/ccbcmd-math-1\/wp-json\/wp\/v2\/license?post=10794"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}