Sharp EL-9650 Handbook page 49

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