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Graphing piecewise functions when an equation is given
Writing a piecewise equation to describe a given graph
Evaluating piecewise functions for given inputs
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Source: Pamela Odom
If the video doesn't start, try skipping ahead a few seconds.
Source: Pamela Odom (using ActivInspire)
If you want to see a few more examples, look at this page at CoolMath.com.
Source: Pamela Odom (using Google Forms)