Grapher allows a fit curve to be added to any line/scatter plot data. A linear fit curve can be used to calculate the slope of the data distribution.

For instance, suppose your scatter plot looks like:

*The data appears to follow a general linear trend.*

The following steps can be used to add a linear fit curve and determine the slope of the line.

- Click on the
*Line/Scatter Plot*in the**Object Manager**to select it. - Click
**Graph Tools | Add to graph | Fit Curve.**By default, a linear fit will be applied. - Click on the
*Linear Fit*in the**Object Manager**to select it. - In the
**Property Manager**, click on the**Plot**tab. - Click the
*Insert*button next to the*Insert into plot document*option. - Click on the screen where you want the text to appear. The equation is in the form Y = M*X+B where M is the slope the line.

*The statistics for the linear fit curve display the slope of the equation.*

*Updated October 08, 2018*

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