1. The relation is a function.
3. −16
5. The graph is a parabola and the graph fails the horizontal line test.
7. [latex]2{a}^{2}-a[/latex]
9. [latex]f\left(2\right)=2[/latex]
11. [latex]x=2[/latex]
13. yes
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- Precalculus. Authored by: Jay Abramson, et al.. Provided by: OpenStax. Located at: http://cnx.org/contents/fd53eae1-fa23-47c7-bb1b-972349835c3c@5.175. License: CC BY: Attribution. License Terms: Download For Free at : http://cnx.org/contents/fd53eae1-fa23-47c7-bb1b-972349835c3c@5.175.