Khan Academy
Khan Academy: Algebra: Perpendicular Lines
This video demonstrates how to determine if lines are perpendicular given the equations. There are three equations listed but they are not all in slope-intercept form. Practice problems available. [3:29]
Khan Academy
Khan Academy: Algebra: Perpendicular Lines 2
This video demonstrates how to find the equation of a line when given a point on the line and the equation of a line perpendicular to it. Practice problems available. [3:01]
Khan Academy
Khan Academy: Algebra: Ca Algebra I: Slope and Y Intercept
This video demonstrates how to solve a variety of test questions related to equations of a line, slope, points on a line, and y-intercepts. [12:30]
Khan Academy
Khan Academy: More Analytic Geometry: Perpendicular Line Slope
This video shows how to find the slope of a line perpendicular to another line.
Sophia Learning
Sophia: Writing a Linear Equation From a Perpendicular Line and Point
This video discusses how to write a linear equation from a perpendicular line and a point. Students learn about the concept through a detailed example. [3:39]