Question

For the graph x = 12 find the slope of a line that is perpendicular to it and the slope of a line parallel to it.

Answer 1

The slope of a line perpendicular to this is (y=a number) 0. That's because the change in the x would be 0, because it would be y=3 or something like that. 

The slope of a line parallel to this is undefined. That's because it has the same slope as this line, and this line has a slope of undefined.