Question

Find the equation of the line perpendicular to the line x-2y=-5 containing the points (4,0)

Answer 1

so -2y=-x-5
y=1/2x+5/2
So the perpendicular line has a slope of -2
y=-2x+b
0=-2(4)+b
0=-8+b
b=8
So your final equation is y=-2x+8

Answer 2

Thanks!