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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
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