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Instructions.

View Source for instructions

<instructions xmlns:pi="http://pretextbook.org/2020/pretext/internal">

<p>
  The slider of the left panel will trace out the piecewise function.
  Simultaneously, the domain will be traced in the middle panel, and the range in the right panel.
</p>

</instructions>

The slider of the left panel will trace out the piecewise function. Simultaneously, the domain will be traced in the middle panel, and the range in the right panel.