Slope-Intercept Form pages 294–296 Exercises 1. –2; 1 2. – ; ; –

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Slope-Intercept Form pages 294–296 Exercises 1. –2; 1 2. – ; 2 3. 1; – ALGEBRA 1 LESSON 6-2 pages 294–296 Exercises 1. –2; 1 2. – ; 2 3. 1; – 4. 5; 8 5. ; 1 6. –4; 0 7. –1; –7 8. –0.7; –9 9. – ; –5 10. y = x + 3 11. y = 3x + 12. y = x + 3 13. y = 1 14. y = –x – 6 15. y = – x + 5 16. y = 0.3x + 4 17. y = 0.4x + 0.6 18. y = –7x + 19. y = – x – 20. y = – x + 21. y = x + 1 2 5 4 3 9 22. y = – x + 1 23. y = x + 2 24. y = 2x – 2 25. y = x + 26. y = – x + 2.8 27. y = x – 28. y = x + 4 8 6-2

Slope-Intercept Form 29. y = x – 1 30. y = –5x + 2 31. y = 2x + 5 32. ALGEBRA 1 LESSON 6-2 29. y = x – 1 30. y = –5x + 2 31. y = 2x + 5 32. y = x + 4 33. y = –x + 2 34. y = 4x – 3 35. y = – x 36. y = x – 3 37. y = – x + 2 3 2 38. y = – x + 4 39. y = –0.5x + 2 40. a. t = 14c – 4 b. $80 4 5 6-2

Slope-Intercept Form 51. y = –2x 52. y = – x – 2 53. y = 5x – 6 ALGEBRA 1 LESSON 6-2 51. y = –2x 52. y = – x – 2 53. y = 5x – 6 41. –3; 2 42. – ; 0 43. 9; 44. 3; –9 45. ; 3 46. 9; –15 47. c; d 48. 2 – a; a 49. –3; –2n 50. y = 7 – 3x 54. y = – x – 55. y = 6x – 8 56. The slope was used for the y-int., and the y-int. was used for the slope. 2 3 1 6-2

Slope-Intercept Form 68. A; slope in A = > = 2 = slope in B. ALGEBRA 1 LESSON 6-2 68. A; slope in A = > = 2 = slope in B. 69. y = 2x – 1 70. y = –4x + 7 71. y = – x + 8 72. y = x + 5 73. y = –x – 3 74. y = 3x – 6 75. a–b. c. Both; check students’ work. 57. a. b. h = – t + 12 c. 90 min 58. a. Slope represents the weight of a gallon of fuel. b. 2662 lb 59. no 60. yes 61. no 62. III 63. I 64. II 8 4 10 4.5 65. a. d = 7p b. 84 dog years 66. a. t = 5d + 15 b. t = 5d + 15 c. Answers may vary. Sample: no neg. charges and no neg. number of days 67. Answers may vary. Sample: Plot point (0, 5), then move up 3 and right 4. Plot (4, 8) and connect the two points. 1 2 15 6-2

Slope-Intercept Form 76. a. ; b. 2; –2 c. same slopes ALGEBRA 1 LESSON 6-2 1 4 1 4 76. a. ; b. 2; –2 c. same slopes 77. Check students’ work. 78. – 79. –5 80. 81. a. x = –2; x = 2 y = 3; y = –3 b. Rectangle; check students’ work. c. y = x OR y = – x; explanations may vary. 82. a. r = –15d + 265 b. r = –15d + 265 c. 18 days 83. D 84. G 85. A 86. [2] slope: = = 2 y-intercept: 3 equation: y = 2x + 3 [1] correct graph and minor error in finding function 87. – 88. – 89. 90. –1 91. 4.8 billion 3 2 3 2 5 – 3 1 – 0 1 2 3 4 9 7 5 6 9 2 6-2