Question

Line D passes through the points (1, 1) and (5, 6). What is the slope of a line perpendicular to Line D?

A -5/4
B -4/5
C 4/5
D 5/4

Answer 1

B -4/5

Explanation:

The slope of line D is given by

m = (y2-y1)/(x2-x1)

= (6-1)/ (5-1)

=5/4

We want the slope of the line perpendicular

That would be the negative reciprocal

- (4/5)