1. The relation is a function.
3. −16
5. The graph is a parabola and the graph fails the horizontal line test.
7. 2a2−a
9. −2(a+b)+1
11. 2
13.
15. even
17. odd
19. x = –7 and x = 10
21. f−1(x)=3x+5
23. (−∞,−1.1) and (1.1,∞)
25. (1.1,−0.9)
27. f(2)=2
29. f(x)={∣x∣ if x≤23 if x>2
31. x=2
33. yes
35. f−1(x)=−2x−11
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Precalculus.Provided by: OpenStaxAuthored by: Jay Abramson, et al..Located at: https://openstax.org/books/precalculus/pages/1-introduction-to-functions.License: CC BY: Attribution. License terms: Download For Free at : http://cnx.org/contents/fd53eae1-fa23-47c7-bb1b-972349835c3c@5.175..