Answers to Lesson Exercises

Lesson #14

1) Yes

2) No

3) (2,-1)

4) (1,3)

5) (5,-21)

6) (-10,-3)

4) Three points are given for each equation to help you check your work (your points may be different, but if you used the same x it should match).

7) (0,2), (1,3), (-2,0)

8) (0,-2), (-1,-5), (1,1)

9) (0,1), (1,5), (2,9)

10) (0,5), (2,1), (-2,9)

11) (0,-4), (1,-7), (-1,-1)

12) (0,-8), (1,-1), (2,6)

13) (0,5), (2,3), (3,2)

14) (0,-1), (-1,1), (1,-3)

15) (0,2), (1,5), (-1,-1)

16) (0,0), (1,-5), (-1,5)

17) (0,4), (1,1), (2,-2)

18) (0,-4), (2,-6), (-2,-2)

19) (0,0), (1,3), (-1,-3)

20) (0,1), (1,7), (-1,-5)

21) (0,-10), (1,-6), (2,-2)

22) (0,-2), (1,-4), (-1,0)

23) 4/3

24) -4/5

25) 1/3

26) -6/7

27) -3/7

28) 2

29) 0

30) 11

Answers to exercises 31-42 list the slope, y-intercept, and x-intercept (in that order).

31) 3, (0,2), (-2/3,0)

32) 3, (0,-12), (4,0)

33) 2, (0,3), (-3/2,0)

34) -2, (0,4), (2,0)

35) -10, (0,-4), (-2/5,0)

36) 5, (0,-3), (3/5,0)

37) -1, (0,4), (4,0)

38) -2, (0,-1), (-1/2,0)

39) 8, (0,2), (-1/4,0)

40) -7, (0,0), (0,0)

41) -2, (0,14), (7,0)

42) -7, (0,-4), (-4/7,0)

 

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Appendix A. Answers to all lesson exercises.