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

For example, suppose your scatter plot looks like this:

*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
**Home | 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 in the*Insert into plot document*field. - Click in the
**Plot**window 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 March 12, 2019*

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