What is the perpendicular slope of m=0?

Answer :

Answer: The slope of a line perpendicular to a line with a slope of 0 is undefined. The perpendicular line is a vertical line. A line with a slope of 0 is a horizontal line.

Step-by-step explanation:

Perpendicular = opposite sign and reciprocal slope
-1/0, nothing can be divided by 0

Solution: undefined