SOLUTION: A line through points (-2, 3) and (1, b) is perpendicular to the line y = (1/2)x-1. The value of b is: a. 1/2 b. -3 c. -2 d. 3/2

Algebra ->  Coordinate Systems and Linear Equations  -> Linear Equations and Systems Word Problems -> SOLUTION: A line through points (-2, 3) and (1, b) is perpendicular to the line y = (1/2)x-1. The value of b is: a. 1/2 b. -3 c. -2 d. 3/2      Log On


   

Question 1049699: A line through points (-2, 3) and (1, b) is perpendicular to the line
y = (1/2)x-1. The value of b is:
a. 1/2
b. -3
c. -2
d. 3/2
Answer by ewatrrr(24785) About Me  (Show Source):
You can put this solution on YOUR website!
A line through points (-2, 3) and (1, b) is perpendicular to the line
y = (1/2)x-1 (Slope = 1/2)
Perpendicular Line: m = -2/1 (negative reciprocal)
(-2, 3) and
(1, b) m = (3-b)/(-2-1)
(3-b)/-3 = -2
(3-b) = 6
-3 = b