Question

Which of the following equations represents a line which is perpendicular to the line that passes through the points below?
(-2,-6) (0,-2)

y=-2x+2
y=1/2x +2
y=-1/2x +2
y=2x+2

Answer 1

slope of the line connecting those 2 points is m= -6-(-2)/-2-0 or -4/-2 or 2. So the slope of the perpendicular must be -1/2 . The only choice that has slope -1/2 is the third one.