Lines a and b are perpendicular, the slope of line a is given below. What is the slope of line b? (A) 3 (B) 3/4 (C) -2 (D) -5/2 (E) -1/2 (F) 2/5 (G) 1

1 Answer
Jun 20, 2018

A) 13

B) 43

C) 12

D) 25

E) 2

F) 52

G) 1

Explanation:

The slopes of 2 perpendicular lines are related in that:
m1m2=1

So, if you know one slope, m1, then the other slope, m2, is the negative reciprocal of m1:
m2=1m1

A) If m1=3, then: m2=13
B) If m1=34, then: m2=43
C) If m1=2, then: m2=12
D) If m1=52, then: m2=25
E) If m1=12, then: m2=2
F) If m1=25, then: m2=52
G) If m1=1, then: m2=1