In addition to displaying the data itself, each series can be configured to display a Trend Line.
This can be useful for displaying a linear regression or an average on the data points.
Enabling the Trend Line
To enable a Trend Line on a series, go to the Series Settings, in tab Advanced, check Trend Line :
Configuring the Trend Line
Legend Text : label of the Trend Line withing the Legend
Line Type : type of regression used to match the data values
Line Color : the Trend Line can have a different color from the series color
Line Style : the Trend Line can be displayed as a continuous line or as a variety of dashed lines