HP Prime Graphing Wireless Calculator Instrukcja Użytkownika Strona 307

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nish sketching a function, tap . The t type for the rst available dataset in Symbolic view (S1–S5)
is changed to User-Dened and the expression (in X) of your t is saved as the user-dened t denition.
Plot Setup view
As with all the apps that provide a plotting feature, the Plot Setup view— —enables you to
set the range and appearance of Plot view. The settings are common to other Plot Setup view operations.
Page 2 of the Plot Setup view has a Connect eld. If you choose this option, straight line segments join the
data points in Plot view.
Predicting values
PredX is a function that predicts a value for X given a value for Y. Likewise, PredY is a function that predicts a
value for Y given a value for X. In both cases, the prediction is based on the equation that best ts the data
according to the specied t type.
You can predict values in the Plot view of the Statistics 2Var app and also in Home view.
Plot view
1.
In the Plot view, tap to display the regression curve for the data set (if it is not already
displayed).
2.
Make sure the trace cursor is on the regression curve. (Press or if it is not.)
3.
Press or The cursor moves along the regression curve and the corresponding X and Y
values are displayed across the bottom of the screen. (If these values are not visible, tap
.)
You can force the cursor to a specic X value by tapping , entering the value and tapping .
The cursor jumps to the
specied point on the curve.
Plotting statistical data 259
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