To graph a function, the equation must be entered into the calculator.
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
Note: Press to type the variable x.
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