Sharp EL-9900 - Manual (Page 75)

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Chapter 4: Basic Graphing Features — Basic Keyboard
2. Press 2 E.
(2 is input to A.)
The graph for “Y1 = 2X 2 ” is
drawn. (Since B and C have
no values, they are ignored.)
At this time, the graph for Y2
is also drawn. Y2 also uses variable A which is used in Y1.
Therefore, the drawing of the graph for Y2 is also valid.
* If you need to draw only the graph for Y2, it is necessary to
change variables (characters) or make the graph drawing for
Y1 invalid.
3. Press 1 E.
(1 is input to B.)
The graph is changed from
“Y1 = 2X 2 ” to “Y1 = 2X 2 +
1X”.
4. Press _ 3 E.
( - 3 is input to C.)
Now, the graph for “Y1 = 2X 2
+ 1X – 3” is drawn on the
screen.
Next, change variable A from 2 to 5 and see how the graph
changes.
1. Press { { 5 E.
(The cursor is moved from C
to A and 5 is input.)
The slope of the graph
becomes sharp.
* Move the cursor accordingly and substitute other numeric
values for variables to view how the graph changes.
* The trace function cannot be used in the substitution feature.
(When U is pressed, the full-screen graph will appear.)