ANSWERS TO HOMEWORK

4) 7/3 6) 1/5

8) Undefined Slope10) -9/2

12) -3, 2√10 14) -2/11, 5√5

24) x = 3

13-3 PARALLEL AND PERPENDICULAR LINES

Answers to Warm Ups

1)-1/2

2)2/3

3)-2/5

4)0

5)Undefined

SLOPE

Parallel Lines have the SAME slope Example: 2 and 2

3 3 Perpendicular Lines have OPPOSITE and

RECIPROCAL slopes Example: 2 and -3 3 2

Lines are NEITHER parallel nor perpendicular if they intersect at an angle other than 90°

TOO: ARE THEY PARALLEL, PERPENDICULAR OR NEITHER?

1) 3, -1/3 2) 3, 3/1Perpendicular Parallel

3) 1/4, 4 4) 1, -1Neither Perpendicular

5) -3/4, 12/9 6) -1/2, 1/2Perpendicular Neither

7) 6/9, 16/24 8) -1/3, 1/(-3)Parallel Parallel

9) 2/3, 6/8 10) Undefined, 0Neither Perpendicular

HOMEWORK

Page 536 Classroom Exercises #1-9