Sharp EL-9900 - Manual (Page 54)

1
Advanced Keyboard/ALGEBRA USING THE SHARP EL-9900
Copyright © 2002, Sharp Electronics Corporation. Permission is granted to photocopy for educational use only.
Graphing and translations of quadratic equations
1. Turn the calculator on and press Y= . Press CL to remove an old Y1
expression. Press ENTER CL to remove an old Y2 expression.
2. To enter the quadratic equation ( y = x 2 ) for Y1, press X/
θ/T/n x 2 .
Enter the viewing window range by pressing ZOOM A (Zoom) 7 (Dec).
3. When 2 is added to x 2 , the resulting equation is y = x 2 + 2. Enter this
function for Y2 by pressing Y=
▼
X/
θ/T/n x 2 + 2 . Press GRAPH .
What does the addition of 2 do?
4. When -2 is added to x 2 , the resulting equation is y = x 2 – 2. To change Y2
for this expression, press Y=
▼
CL X/
θ/T/n x 2 – 2 .
ENTER GRAPH . What does the addition of -2 do?
5. Summarize the effect of k within the standard equation y = a(x – h) 2 + k.
QUADRATIC EQUATIONS