Quiz 13.4-13.7 Review Answers

Vectors; The Midpoint Formula 1. (2, 4), 2√5 2. (4, 3), 5 7. k = 16/3 8. k = 8 9. (3, 6) 11. (5, ­10) 13. (1, 5) 15. (­1.5, ­1) 17. (A + 4, 2.5) 19. d = 2√13, m = ­2/3, (­1, ­4) 20. d = 10, m = 4/3, (1, 1) 22. (7, 10) 27. (­r, 8 – s) Graphing and Writing Linear Equations 1. x int = 4, y int = 8 5. m = 3, b = ­1 9. (4, ­1) 11. y = ­4x – 2 12. y = ½ x + 6 13. y = ½ x – 2 14. y = ­3x + 1 15. y = ­2x ­3 16. y = 1/7 x + 1 17. y = ½ x + 1 18. y = 5x – 13 19. x = ­2 20. y = ­2x + 11