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

Explanation:

A line whose equation has the form x = 12 is a VERTICAL line whose slope is undefined (because x does not change and division by zero is undefined). Another line parallel to this one has the same slope: "undefined."

Another line perpendicular to x = 12 has slope m = 0.