EL-9600/9400 Graphing Calculator
Notes
Step & Key Operation
(When using EL-9600)
*Use either pen touch or cursor to operate.
Display
(When using EL-9600)
y =
|
x
| changes to
y =
|
x
-2|
2
-
1
Move the original graph to the right
by 2.
*
*
3
-
1
Access the Change feature.
*
2
-2
Save the new graph and look at the
relationship of the function and the
graph.
*
*
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3
-
2
Select
y =
|
x
|.
*
3
-
3
Make the slope of the graph steeper.
Save the new graph.
y =
|
x
|
➞
y =
2|
x
|
3
-
4
Make the slope of the graph minus.
Save the new graph.
y =
|
x
|
➞
y = -
|
x
|
3
-
5
Look at the relationship of the function
and the graph.
*
*
*
Notice that the coefficient
a
in the standard form
y = a
|
x -
h
|
+ k
takes
charge of changing the slope.
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EL-9600/9400 shows absolute values with | | just as written on paper by using the
Equation editor. Use of the calculator allows various absolute value functions to be
graphed quickly and shows their characteristics in an easy-to-understand manner. The
Shift/Change feature of the EL-9600/9400 allows visual understanding of how graph
changes affect the form of absolute value functions.
Notice that the function
h
in
the standard form
y = a
|
x -
h
|
+ k
takes charge
of horizontal movement of
the graph.
8-2
ALPHA
ENTER
ENTER
ENTER
ENTER
3
2nd F SHIFT/CHANGE
B
ENTER
ENTER
ALPHA
ALPHA
HB1.DocC.
98.10.1, 11:41 AM
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