Often it is convenient to have the TI-89 generate a table of values for a function (or functions) using a constant increment between each x value. To do this:
First, you have to be sure that the function is defined and checked ( key on the Y= screen). The table that you generate will contain values for all checked functions. |
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Press (Tbl Setup) to bring up the Table Setup screen. Here, you enter the starting x-value for the table and the increment between values. If Independent is AUTO, Graph <--> Table has the following effect:
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Once the table is initialized, press (Table) to view the table. You can use the arrow keys to scroll through the table, and to change the starting value or increment. |
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Sometimes it is most convenient to enter the x-values that you want manually. The function shown at right is from Example 1 on p. 48 of the Larsen Text. You want to find y values for selected x values near x = 0. (You could also use the "|" operator on the home screen to generate values of this function, also, but table form is often convenient, and the table can calculate for several functions at once.) |
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On the Table Setup screen, set Independent to "2: ASK". The starting value and increment here don't matter. |
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For every x value you enter, the y-value is calculated for each defined-and-checked function. Oops! Notice that the y-value for x = 0.0001 does not match the value given in the text - the value in the table has been rounded. |
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To display more digits, pull down the "F1: Tools" menu and select "9: Format". |
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Use the pull-down menu to select the number of digits that you want. |
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Here is a more-precise value (using 10 digits). |