Pg. 26 Answers #12-51 by 3’s
12. 15.
18. 21.
24. 27.
30. 33. ; avg. cost per item
36. 39.
42. 45.
48. 51.
Pg. 33 Answers #15-57 by 3’s
15. 2; y = 2x 18. 4; y = 4x
21. -50; y = -50x 24. 3; y = 3x
27. 20; y = 20x 30. p = kq
33. 60 36.
39. 42.
45. 5 48. 7
51. 3
54. No, there is no k such that y = kx for every x in the table.
57. No, there is no k such that y = kx for every x in the table.
Pg. 486 Answers #15-33 by 3’s and 43
15. 18.
21. y = 9xz; -108 24. ; 0.18
27. y = 10xz; 108 or 100,000,000
30. ; 12 33. ;
43. 6 ft.
Pg. 41 Answers #13-20, 22
13. y = 0.80 x + 1.36
14. y = 0.97 x – 0.04
x ≈ 7.26
15. r = -1 16. r ≈ 0.87
17. r = 1 18. r ≈ -0.84
19. r ≈ 0.63 20. r ≈ -0.91
22 a. y ≈ -0.60 x + 23.70 b. r ≈ -0.8; fairly strong negative correlation
c. 7.5 CD’s d. 14.5 years old
Pg. 72 Answers #1-51 odd including 4, 30, 32
1. not linear 3. linear (35, 25)
4. 67, 93, 100, 127, 167
Mental Age / IQ10 / 67
14 / 94
15 / 100
19 / 127
25 / 167
m /
5.
7. 9.
11. 13.
15. y = 100x + 398 17. y = 4
19. x = -2 21. y = -1.25x + 10.5 or
23. 25.
27. 0.005; y = 0.005x 29. 50 mm
30. 50 kg
31. negative correlation
32. Positive correlation;
33. t = h + 15 35.
37. 39.
41. x < 8 and x > 3 43. x < 8 or x > 3 (all real numbers)
45. x = 40, -40
47. x = 4.5, -4.5
49. x -40 or x > 40
51. all real numbers