To graph a function, the equation must be entered into the calculator. Pressing

brings up a window where up to 99 equations may be entered.

An equation is deleted using the cursor to select the unwanted equation and pressing .

Press to type a leading negative sign.

Press to type a subtraction symbol.

Any character in an equation can be deleted. Highlight the character and press .

Characters can be inserted in an equation. Highlight the entry after which the characters are to be inserted. Press .