Sharp EL-9900 User Manual

Page 72

Chapter 4: Basic Graphing Features — Basic Keyboard

2. Press

@, and d to enter the DRAW menu, then press

G to select G SHADE. The SHADE sub-menu appears.

3. Press

1 to select 1 SET.

The “Set shade” window

appears.

4. Using the cursor keys, move

the cursor pointer to the

appropriate position.

5. Press

@ z A.

6. Press

1 to select Y1.

7. When the value is set, press

the

G key. The graph will

be redrawn.

8. Let’s add another inequation,

so that the area where the

two inequality overlap can be shaded. Press the

Y key,

and enter another simple graph equation such as “X

4” for

“Y2”.

9. Now, return to the SHADE menu by pressing

@ d,

and

G. Press 1 to select “1 SET”.

10. Within the “Set shade” window, add the second equation at the

right of the topmost inequation. Use the

' or ; key to

position the underscore cursor, then select “Y2” using the

VARS menu.

11. Press the

G to redraw the graph with the new shading

appearance.