Chapter 4: Linear Functions
Sal Khan offers detailed lessons on the coordinate plane, ordered pairs, graphing solutions to equations, linear relationships, x and y intercepts, proportional relationships, rates, slopes, graphing linear equations using different forms, and analytic geometry (parallel and perpendicular lines), and graphing linear inequalities. He has plenty of interactive practices to master skills on linear functions, which are used in future mathematics courses such as Geometry, Algebra 2, Precalculus, and Calculus.