Write the equation of a line PERPENDICULAR to X = 3 passing through (4, -5)

Answer 1

Couple things here that help us out...

1) x=3 is a vertical line, so if you are looking for a line that is perpendicular you are looking for a horizontal line.

And horizontal lines go through the y-axis and have equations of y= a #

2) the point on the vertical line is (4,-5), it has a y-value of -5

****Every y value on a horizontal line will be the same****

so the equation for a perpendicular line would be y= -5