Texas Instruments TI-80 Getting Started: Shading a Graph

7-2 Draw Operations
Getting Started is a fast-paced introduction. Read the chapter for details.
Shade the area below the function Y=XäN2 and above the functions Y=X+1 and
Y=-X.
1. If necessary, select FUNC mode. Press ( and enter
the functions:
Y1= @ a | 2 ¸
Y2= @ « 1 ¸
Y3= · @ ¸
(Be sure that Y4 is cleared or turned off.)
2. Press * 4 to select the ZDECIMAL viewing
window, clear any existing drawings, and display the
viewing window and graph.
3. Press 2 . to return to the Home screen.
4. Press 2 F 7 to select SHADE_Y<, which is
copied to the Home screen.
5. Press 2 G 1 (to select Y1).
6. Press 2 ° to add another instruction to this line.
7. Press 2 F 6 to select SHADE_Y>, which is
copied to the Home screen.
8. Press 2 G 2 (to select Y2) b 2 G 3 (to
select Y3).
9. Press ¸ to see the functions and shading on the
graph.
Getting Started: Shading a Graph