[ Interactive: Perpendicular Lines ]
Find the corresponding perpendicular slope.
Are the lines parallel, perpendicular or neither?
This three step process using slope-intercept form always works. We could find this equation using point-slope form as well as demonstrated below.
Example: Find the equation of the line perpendicular to y = −1/4 x + 2 passing through the point (−1, −5).
Instructional Video: Parallel and Perpendicular Lines - Part 2
Find the equation of the line. (Using slope-intercept form.)