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The function table allows you to display a defined function in a tabular form. To set up a function table:
| 1. | Press o. |
| 2. | Enter a function and press <. Functions allow up to one level of fractions. |
| 3. | Select the table start, table step, auto, or ask-x options and press <. |
The table is displayed using the specified values.
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Start |
Specifies the starting value for the independent variable, x. |
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Step |
Specifies the incremental value for the independent variable, x. The step can be positive or negative, but cannot be zero. |
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Auto |
The TI-30XS MultiView™ calculator automatically generates a series of values based on table start and table step. |
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Ask-x |
Lets you build a table manually by entering specific values for the independent variable, x. |
³ Problem
Find the vertex of the parabola, y = x(36 - x) using a table of values.
Reminder: The vertex of the parabola is the point on the line of symmetry of the parabola.
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o z D 36 U z E < |
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- 15 $ - 3 $ $ < |
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After searching close to x = 18, the point (18, 324) appears to be the vertex of the parabola since it appears to be the turning point of the set of points of this function. To search closer to x = 18, change the Step value to see points closer to (18, 324).
³ Problem
A charity collected $3,600 to help support a local food kitchen. $450 will be given to the food kitchen every month until the funds run out. How many months will the charity support the kitchen?
Reminder: If x = months and y = money left, then y = 3600 - 450x.
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o 3600 U 450 z |
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< 0 $ 1 $ " < $ < |
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Input guesses < |
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The support of $450 per month will last for 8 months since y(8) = 3600 - 450(8) = 0 as shown in the table of values.