3-4-10

Using Table & Graph

u Specifying all x-values

This method generates a reference table by looking up data stored in a list. A LIST variable is used to specify the x-values. When using this method, it is up to you specify all of the correct x-values required to generate the summary table. The summary table will not be generated correctly if you provide incorrect x-values.

The following shows examples of each of the three available summary table generation methods by generating a table for the function y = x3 – 3x.

x

–1

 

0

 

1

 

 

 

2

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

f￿(x) +

0

–

–3

–

0

+

 

 

1

 

 

 

 

 

 

 

 

 

 

 

 

f ￿(x) –

–6

–

0

+

6

+

–2

–1

1

2

 

 

 

 

 

 

 

f (x)

2

 

0

 

–2

 

 

 

–1

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

–2

 

Summary Table and Graph of y = x3 – 3x (The graph to the right is for reference only.)

Tip

•You can control whether or not the summary table should include an f ￿(x) line (quadratic differential component) using the [Summary Table f ￿(x)] setting on the [Cell] tab of the Basic Format dialog box (page 14-3-3). Turning on the [Summary Table f ￿(x)] option causes both linear differential components and quadratic differential components to be displayed in the summary table. Turning it off shows linear differential components only.

kGenerating a Summary Table Using Automatically Set x-Values

With this method, the summary table is generated using a range of values from –∞to ∞.

u ClassPad Operation

(1)On the Basic Format dialog box, select “View Window” for the [Summary Table] setting, and specify the value you want for [Cell Width Pattern]. This example uses a [Cell Width Pattern] setting of “4 Cells”.

•To open the Basic Format dialog box, tap O, [Settings], [Setup], and then [Basic Format].

•For additional details about Basic Format settings, see “14-3 Setup Menu Settings”.

(2)Input the function y = x3 – 3x on the Graph Editor window.

•Generation of summary tables is supported for “y=” type functions only.

•Clear the check boxes of all other functions on the Graph Editor window, if necessary. Select the check box next to y = x3 – 3x and press E.

•If the check boxes of more than one “y=” type functions are selected, the one with the lowest line number (y1, y2, y3, etc.) is used for number table generation.

(3)Tap 6 to display the View Window dialog box.

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