What is the slope of a line perpendicular to the line with a slope of 3/5

Answer 1

To find perpendicular slope, you take the opposite reciprocal of the slope you have been given. So the slope perpendicular to 3/5 is -5/3.

Answer 2

Perpendicular lines have negative reciprocal slopes. That means the fraction is flipped and multiplied by negative 1. So if one line has a slope of 3/5, then a line perpendicular to it has a slope of -5/3.