CK-12 Foundation
Ck 12: Algebra: Graphs of Absolute Value Equations
[Free Registration/Login may be required to access all resource tools.] This lesson covers graphing absolute value functions. Students examine guided notes, review guided practice, watch instructional videos and attempt practice problems.
Purple Math
Purplemath: Graphing Absolute Value Functions
Introduces the basic technique for graphing absolute-value functions, and illustrates a common mistake.
Khan Academy
Khan Academy: Algebra I: Evaluate Piecewise Functions
Given the formula of a piecewise function, evaluate it for a specific input. Students receive immediate feedback and have the opportunity to try questions repeatedly, watch a video or receive hints.