CK-12 Foundation
Ck 12: Algebra: Standard Form of Linear Equations
[Free Registration/Login may be required to access all resource tools.] This lesson covers finding the equation of a line in standard form and the intercepts.
Sophia Learning
Sophia: Writing a Linear Equation From a Perpendicular Line and Point
This lesson presents how to write an equation of a line that passes through a given point and is perpendicular to a given line.