How to Graph Inequalities on the TI-Nspire
With the Graphs application on the TI-Nspire, you can graph a single inequality or multiple inequalities. To graph a single inequality, follow these steps, and to graph multiple inequalities, repeat Steps 1 through 3:
Press [CTRL][G] to open the entry line and position the cursor to the right of the first available function.
Press [ENTER] until the equals sign is deleted.
Type a number to choose your inequality, and press [ENTER] to view its graph.
Repeat Steps 1 through 3 to graph additional inequalities.
Following are a few additional things you need to know about inequality graphing:
You have the option of using the Text tool to type your inequality. Drag the text expression to the x-axis to graph the inequality.
Less than (<) and greater than (>) inequalities have dashed boundary lines.
Less than or equal to and greater than or equal to inequalities have solid boundary lines.
Use the Intersection Point(s) tool (press [MENU]→Points & Lines→Intersection Points) to find the intersection point of your inequalities.
Change the fill color of the inequality shading to better see the solution region. Did you know that blue and red make purple when the shaded regions overlap? To change the color of the shaded regions, right-click by pressing [CLICK][MENU]→Color→Fill Color.