Question

A line contains the points (1, –6) and (–2, 6). What is the slope of a line that is perpendicular to this line?
A. -1/4
B. 4
C. 1/4
D. –4

Answer 1

C) 1/4


m = (y2 - y1) / (x2 - x1)
m = (6 - (-6) / (-2 - 1) = 12 / -3 = -4
The negative reciprocal of -4 is -1 / (-4) = 1/4