CHAPTER 1 Section 1.1 Solutions -------------------------------------------------------------------------------1. Not a function – 0 maps to both −3 and 3.
2. Not a function – 2 maps to both −2 and 2, and 5 maps to both −5 and 5.
3. Not a function – 4. Function 4 maps to both −2 and 2, and 9 maps to both −3 and 3. 5. Function
6. Function
7. Not a function – 8. Not a function – Since 1, −2 2 and 1,2 2 are both on Since (1,−1) and (1,1) are both on the graph, it does not pass the vertical line the graph, it does not pass vertical line test. test.
(
)
(
)
9. Not a function – Since (1,−1) and (1,1) are both on the graph, it does not pass the vertical line test.
10. Function
11. Function
12. Function
13. Not a function – Since (0,5) and (0,−5) are both on the graph, it does not pass the vertical line test.
14. Not a function – Since (0,4) and (0,−4) are both on the graph, it does not pass the vertical line test.
15. Function
16. Function
17. Not a function – Since ( 0,−1) and ( 0,−3 ) are both on the
18. Function
graph, it does not pass the vertical line test. 19. a) 5
b) 1
c) −3
20. a) 1
170
b) −5
c) 0