The Symbolic view includes an expression (Fit1 through Fit5) that defines the regression model, or “fit”, to use for the regression analysis of each
| There are three ways to select a regression model: | ||
| • | Accept the default option to fit the data to a straight | |
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| line. |
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| • | Select one of the available fit options in Symbolic | |
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| Setup view. |
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| • | Enter your own mathematical expression in Symbolic | |
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| view. This expression will be plotted, but it will not be | |
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| fitted to the data points. |
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Angle Setting | You can ignore the angle measurement mode unless your | ||
| Fit definition (in Symbolic view) involves a trigonometric | ||
| function. In this case, you should specify in the mode | ||
| screen whether the trigonometric units are to be | ||
| interpreted in degrees, radians, or grads. | ||
To choose the fit | 1. | In Numeric view, make sure | is set. |
Fit models
2.Press 
3.Press 
and select from the list. Press 
when done. The regression formula for the fit is displayed in Symbolic view.
Ten fit models are available:
Fit model | Meaning |
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Linear | (Default.) Fits the data to a |
| straight line, y = mx+b. Uses a |
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Logarithmic | Fits to a logarithmic curve, |
| y = m lnx + b. |
Exponential | Fits to an exponential curve, |
| y = bemx. |
Power | Fits to a power curve, y = bxm. |
Statistics aplet |