Sharp EL-9650 - Page 49

EL-9650/9600c/9450/9400 Graphing Calculator
NotesStep & Key Operation
(When using EL-9650/9600c)
*Use either pen touch or cursor to operate.
Display
(When using EL-9650/9600c)
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2-1
Change to parametric mode.
*
*
2-2
Rewrite x = y
2
-2 in parametric form.
Enter X1T = T
2
-2 and Y1T = T.
Let y = T and substitute in x
= y
2
- 2, to obtain x = T
2
- 2.
*
2-3
View the graph. Consider why only
half of the parabola is drawn.
(To understand this, use Trace fea-
ture.)
The graph starts at T =0 and
increases. Since the window
setting is T ≥ 0, the region T
< 0 is not drawn in the graph.
( )
2-4
Set Tmin to -6.
*
2-5
View the complete parabola.
The calculator provides two methods for graphing parabolas, both of which
are easy to perform.
10-1
GRAPH
GRAPH
Y=
E
(
-
)
ENTER
x
2
WINDOW
TRACE
—
2
2
6
ENTER
2nd F SET UP
X/ /T/n
X/ /T/n
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