INTERACTMATH.COM
This site has extra practice problems for each section in the textbook. If you get stuck, it will walk you through the problems! Choose: “Demana: Precalculus: Graphical, Numerical, Algebraic, 7e”
Interactmath.com
Interactmath.com
Khan academy
Click here for video tutorials!
youtube
Click here to watch a video on how to graph piecewise functions on a graphing calculator.