83
GRAPHING FUNCTIONS
Procedures:
The following steps enlarge the section of the graph
marked by in the diagram shown on the right.
1. Move the cursor to corner
1
, and press ®. ( ≤
≤...< <...®)
2. Move the cursor to corner
2
. (≥ ≥...> >...)
A rectangular box appears on the display to show the section selected for zooming.
3. Press ®. The section of the graph selected by the rectangular box is drawn to
fill the entire graph display area.
* The touch-pen can also be used to select a section to zoom.
* When the touch-pen is used, touch corner
1
twice with the
pen, then touch corner
2
twice.
* When the zoom function is used, the graph range changes
from the initial value according to the zooming ratio.
The graph range stays in that setting unless the range setting
is changed or returned to the default setting.
(6) Displaying equations
Before using the trace function, follow the steps below to display the equation of the
graph shown on the screen.
The [C EXPRES] menu of the FORMAT menu is used to display an equation on the
screen.
Press Ï
C 1 ¬ .
The equation “Y1=–(x+2)
2
+5” will be displayed at the
upper left corner of the display.
* Only one equation can be displayed. Of the entered functions,
the equation with the smallest graph number is displayed.
The function equation can be displayed on the TRACE screen.
1
2
→
→
Equation of the displayed graph
EL-9650-(04)En (079-134) 8/7/00, 9:07 PM83
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