Question

The equation of a line is y=-1/2x-1 What is the equation of the line that is perpendicular to the first line and passes through the point (2, –5)?
a. y=2x+1
b. y=1/2x-6
c. y=-2x-1
d. y=2x-9

Answer 1

First, write it out in point-slope form and then simplify it to slope-intercept form.
(y+5)=2(x-2)
y+5=2x-4
y=2x-9
The answer is D.