TI-84 Plus CE Graphing Calculator For Dummies, 3rd Edition
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You can use the X= editor in your TI-84 Plus calculator to define some equalities and inequalities. Equalities and inequalities of the following form are defined in the X= editor the same way inequalities are defined in the Y= editor:


To access the X= editor, follow these steps:

  1. If you are not currently in the Y= editor, press [Y=] to get there.

  2. Repeatedly press the up-arrow key until the cursor is on X= in the upper-left corner of the Y= editor.

    This is illustrated in the first screen.

  3. Press [ENTER] to access the X= editor.

The number N in the inequality can be entered as an arithmetic expression, as illustrated in the second screen. That expression is evaluated by the calculator after you press [ENTER], the up-arrow key, or the down-arrow key as illustrated in the third screen.

To return to the Y= editor from the X= editor, repeatedly press the up-arrow key until the cursor is in the upper-left corner of the screen, and then press [ENTER].

When you exit the Inequality Graphing app, all entries made in the X= editor are erased.

About This Article

This article is from the book:

About the book author:

Jeff McCalla is a mathematics teacher at St. Mary's Episcopal School in Memphis, TN. He cofounded the TI-Nspire SuperUser group, and received the Presidential Award for Excellence in Science & Mathematics Teaching.

C.C. Edwards is an educator who has presented numerous workshops on using TI calculators.

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