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Creating Variables in Graphs
In the Graphs application, functions defined on the entry line are automatically stored as variables.
In this example, f1(x)=x3 is automatically stored as a variable definition named f1, which you can use in other applications in the problem, including a table in the Lists & Spreadsheet application.
When you tap ENTER, the equation is graphed, and the variable is defined. Tap 
to see the list of defined variables.
