Sharp EL-9650, Operation Manual, Page: 142 / 373

132
CHAPTER 4
• 22 kinds of variables (characters), A to Z except for R, T, X, and Y can be used for
the substitution graph.
• Up to seven variables (characters) can be used for one equation. (If the equation
contains more than seven variables (characters), up to seven characters from the
top of the equation are determined as variables and subsequent characters are
ignored.)
• If you attempt to execute an equation containing no variables, the substitution graph
becomes invalid and the error message, “NO VARIABLE”, appears on the screen.
• To input the equation, there are the following two methods after
has been
pressed. After the equation has been input, the same operations apply to
subsequent steps.
1
Input an equation directly.
<Example>
Input “AX
2
+ B” to “Y1”.
Press
(move the cursor to Y1),
¬ Å
A
Ó + Å
B.
2
Press
to select a desired equation from the equation list built into the rapid
graph function (if the desired equation is included in the rapid graph function).
<Example>
Input the same example above.
Press
(move the cursor to Y1)
¬ 1 ® ≥ ® ®
.
<Example>
Substitute numeric values under the conditions that “Y1 = AX
2
+ BX + C” and
“Y2 = AX” have been input.
Equation input screen
The cursor pointer is located at Y1. Drawing of
both graphs Y1 and Y2 is valid.
EL-9650-(04)En (079-134) 8/7/00, 9:08 PM 132