Fathom user Kathy Powenski wrote Bill Finzer, asking how to hide equations in a function plot, so her pre-calc students can use sliders to match some basic functions. Although you can't "hide" functions, Bill suggested she use data in the graphs. Here's a PDF of her worksheet for this activity.

The data for this activity is included with Fathom. You can find it on the Fathom CD by selecting “Open Sample Document” from the File menu, then navigating to Sample Documents | Mathematics | Algebra | MatchMyPlot.ftm.