How to Write Equations for Parallel and Perpendicular Lines

The Organic Chemistry Tutor

This instructional video provides a comprehensive tutorial on writing equations for lines that are either parallel or perpendicular to a given line and pass through a specific point. The narrator systematically walks through six distinct examples, increasing in complexity from simple integer slopes to fractional slopes. Two primary methods are demonstrated for finding these equations: using the slope-intercept form ($y = mx + b$) to solve for the y-intercept, and using the point-slope form ($y - y_1 = m(x - x_1)$) to write the equation directly before converting it.