The slope of a line that is perpendicular to a line that had an undefined slope - 1

If the slope is undefined then the perpendicular line has slope 0.

If the line has slope - 1 then the perpendicular slope is 1.

Step-by-step explanation:

Perpendicular lines have a relationship between their slopes. Their slope are negative inverses of each other. This means is one is 3 then the negative reciprocal is the other or - 1/3. If the slope is undefined then the perpendicular line has slope 0.

If the line has slope - 1 then the perpendicular slope is 1.

Hello there,

the slope of a line that is perpendicular to a line that had an undefined slope - 1

Therefore,

The line has slope - 1

then the perpendicular slope is 1.