Press APPS. Scroll up or down to reach Inequalz and press ENTER. The inequalz application will know control function graphing. Open the Y= editor to enter at least two inequalities . Use the tabs at the bottom to type in the relational operators. You will have to press [ALPHA] followed by [F1], or [F2], etc
Press the GRAPH function key (F5) to draw the graphs. You get the two regions superposed (original shading).
Press [ALPHA][F1 or F2] to activate the [SHADES] tab. This open up the following screen.
On this screen you can choose the type of shading 1: Intersection of the two regions ( the part of the plane that satisfies both inequalities, 2 the union of the two regions or 3 the original shading (as compared to choice 2). Selecting option 1:intersection gives you the following screen.
If you press the [ALPHA][F5] keys you have the HELP ? screen below.
If you press the [ALPHA] [F3] keys you get a Point of Interest (You should consult the manual for the Inequalz application for more details.
By pressing the TRACE button (not ALPHA F4) and the left or right arrows you you can follow the graph of one of the functions. You jump to the other functions by pressing the Up or Down arrows.
To get the manual for Inequalz go to the education.ti.com and
download it.