ANSWERS A-45 9. 2 4 6 1 3 5 7 Frequency Class 27.5 33.5 39.5 45.5 51.5 57.5 63.5 10. $815 11. $790 12. 75% 13. 79% 14. $82,000 15. $860 16. 87.10% 17. 89.44% 18. 10.56% 19. 94.52% 20. a) Time (minutes) Time Spent Studying 50 0 10 70 90 100 40 60 80 20 30 60 70 80 40 50 90 100 Grade (percent) y x b) Yes c) 0.950 d) Yes e) y x 0.77 24.86 = + f) ≈83 30. a) 0.75 1.00 1.25 1.50 1.75 2.00 50 100 150 200 Price (dollars) Number Sold x y Daily Sales b) Yes; negative c) 0.973 − d) Yes e) y x 79.4 246.7 = − + f) ≈120 sold 31. 180 lb 32. 185 lb 33. 25% 34. 25% 35. 14% 36. 19,200 lb 37. 238 lb 38. 150.6 lb 39. 2 40. 0 and 2 41. 2 42. 3.5 43. 7 44. 3.79 1.95 ≈ 45. Number of Children Number of Families 0 5 1 4 2 5 3 3 4 1 5 0 6 1 7 1 46. and 47. 0 1 2 3 4 5 6 7 1 0 2 3 4 5 Number of Children Number of Families Histogram of Number of Children 48. No, it is skewed to the right. 49. Answers will vary. 50. Answers will vary. CHAPTER TEST, PAGE 841 1. 37 2. 38 3. 38 4. 34.5 5. 25 6. 84 9.17 ≈ 7. Class Frequency 25–30 7 31–36 5 37– 42 1 43– 48 7 49–54 5 55– 60 3 61– 66 2 8. 2 4 6 1 3 5 7 Frequency Class 27.5 33.5 39.5 45.5 51.5 57.5 63.5 Chapter 13 SECTION 13.1, PAGE 849 1. Graph 3. Edge 5. Path 7. Degree 9. C A B D 11. A B C D E F G 13. B A C 15. a) No, there is no edge connecting vertices B and E. b) Yes, there are edges connecting vertex D to vertex E, vertex E to vertex C, vertex C to vertex B, and vertex B to vertex A. c) No, the path does not begin and end with the same vertex. d) Yes, it is a path that begins and ends with the same vertex. 17. a) Yes. One example is B A C E D B C , , , , , , . b) No c) No 19. Yes. One example is B A C E D B , , , , , . 21. Disconnected 23. Connected 25. a) Edge BC b) Loop FF 27. a) Edge BC b) No loops
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