Sharp EL-9900 - Manual (Page 24)

3
Basic Keyboard/ALGEBRA USING THE SHARP EL-9900
Copyright © 2002, Sharp Electronics Corporation. Permission is granted to photocopy for educational use only.
1. Graph the equation y = x by pressing Y= CL to remove an old Y1
expression, and press x to enter the equation.
2. Press ENTER CL to clear Y2 or additional prompts.
3. Use the default viewing range, and press ZOOM A (ZOOM)
5 (Default) to view the graph.
4. Adding 2 will result in the equation y = x + 2. Enter this equation for Y2 by
pressing Y=
▼
x + 2 .
5. To view both the graphs on the same coordinate axes, press GRAPH .
The graph y = x + 2 has shifted up from the graph of y = x . The y -
intercept is now y = 2.
6. Subtracting 2 will result in the equation y = x – 2. Enter this equation for Y2
by pressing Y=
▼
CL x – 2 .
7. To view both the graphs on the same coordinate axes, press GRAPH .
The graph y = x – 2 has shifted down from the graph of y = x . The y -
intercept is now y = -2.
CHARATERISTICS OF THE y-INTERCEPT