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Analyzing a Function Used to Draw a Graph
To obtain the minimum value, maximum value,
and inflection of a function
Example: To graph the function
(1) Display the View Window dialog box, and then configure it with the following
parameters.
xmin = –7.7,
xmax = 7.7, xscale = 1
ymin = –3.8,
ymax = 3.8, yscale = 1
(2) On the Graph Editor window, input and store
then tap
to graph it.
• Make sure that only
(3) Tap [Analysis], [G-Solve], and then [Min], or tap
• This displays "Min" on the Graph window, and locates a pointer at the first solution of
the minimum value (minimum value of
y
-coordinates at the current pointer location are also shown on the Graph window.
(4) To obtain other minimum values, press the left or right cursor key, or tap the left or
right graph controller arrows.
• If there is only one solution, the pointer does not move when you press the cursor
key.
Re ult Screen hot
Tip
• To obtain the other values, select the applicable command on the [G-Solve] menu in step (3) of
the above procedure.
To obtain this value:
Maximum value
Maximum value in the range
displayed on the Graph window
Minimum value in the range
displayed on the Graph window
y -intercept
Point of inflection
3-8-3
1
2
y
x
x
x
=
(
+ 2)(
2
y
1 is checked.
y
for smallest value of
Select this G-Solve menu command:
Max (or tap U)
f Max
f Min
y -intercept
Inflection
20060301
f
f
y
Max,
Min,
– 2) and obtain its minimum value
1
2
y
x
x
x
=
(
+ 2)(
– 2) into line
2
.
x
). The
-intercept,
y
1, and
x
- and
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