Texas Instruments TI-NSPIRE Software Manual page 107

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From left to right, the parts of this line are:
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Hide/Show function button.
Á
Attributes button.
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f1(x)= is the default notation for a function or inequality.
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Blank area into which you enter the function, polar equation,
inequality, parametric, or scatter plot data to be graphed.
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Expand/Contract (History) button.
Parametric Mode entry line.
Scatter Plot Mode entry line
Polar Mode entry line
Using Graphs & Geometry
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