1. Relations and Functions
ALGEBRA 1 LESSON 5-2
pages 244–246  Exercises
1. {4, 5, 6}, {3, 6, 7, 19}
2. {–3, –2, 0, 4}, {5, 7, 8, 22}
3. {–2, 2, 3}, {–3, –2, 3}
4. {1}, {–7, 0, 5, 6.1, 10}
5. {–3.1, 1.2, 8.4}, {–5.2, 0, 4}
6. {– , , 4, 5}, {–1, 0, }
7. yes
8. no
9. no
10. yes
11. no
12. no
13. yes
14. no
15. 4
16. –34
17. 9
18. 12
19. 18
20. –7
21. –
22. 5
23. {0.5, 53}
24. {–8, –2, 18}
25. {–27, –7, –2, 8, 48}
26. {–4 , – , 0}
27. no
28. no
29. yes; {–4, –1, 0, 3}; {–4}
30. No; two 4-year-old iguanas
may have different lengths.
31. Answers may vary. Sample:
A relation is not a function if
two range values have the
same domain value. 1 2 3 4 2 3 1 2 3 5 3 4
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2. Relations and Functions
ALGEBRA 1 LESSON 5-2
38. yes
39. no
40. yes
41. a. Answers may vary. Sample:
The cost appears to be far too little.
b. Answers may vary. Sample:
The student failed to convert
hours to minutes.
c. $10.80
d. whole numbers; positive numbers
42. a. 3,720,000 mi
b. 11,160,000 mi
32. a. {–300, –210, 0, 72}
b. Domain is the number
of cameras sold, and
range is the profit.
33. Answers may vary. Sample:
Data represent the ages (x)
and heights (y) of 4 students.
34. {–3, 3, 15.8}
35. {–13.8, –1, 5}
36. {–0.5, 0, 2.7}
37. {–0.75, 0, 12.69}
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3. Relations and Functions
ALGEBRA 1 LESSON 5-2
43. 23
44. 18
45. 6
46. 20
47. Yes, it passes the vertical
line test; no, it doesn’t pass
the vertical line test.
48. a. 0, –1, –2, –6
b. all integers
51. –3
52. 3
53. [2]
Yes, the data represent
a function. (OR graph shown)
[1] shows calculation but no
mapping diagram or graph
54. Labels may vary. Sample:
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4. Relations and Functions
ALGEBRA 1 LESSON 5-2 mi mi mi mi mi mi
, 33.5, none, 3
62. – , 0, –2 and 1, 4
, 5, 5, 11
, 14, 13, 11
65. – , –7, –7, 8
, 46.5, 43 and 48, 10 1 5 52 9
117 8 47 8
5-2