graph
By |Published On: May 27, 2025 at 2:15 am PDT|Last Updated: May 27, 2025 at 4:26 am PDT|

Linear Regression Line

This tutorial will show how to use the TechGraph Editor to fit a linear regression line to a set of XY data points.  Shown below are the settings in the Data Table and the Edit Chart used to create this chart.        

Data Table – Sample data can easily be changed or replaced by pasting data from an external worksheet.
  • Graph Type is Scatter.
  • X Data Type is Number.  X Data column contains the X values.
  • Graph A series is set to Scatter and it contains the Y values.

Note:   Click on the “Help” button on the toolbar to find out how to edit, delete, copy and paste in the Data Table.

Edit Chart – A set of icons (Titles, Settings, X Axis, Y Axis, Curves and Error Bars) to change the settings and appearance of the chart.    

     Settings  – specify the color, marker type and size for Graph A marker.         

  •  Click on the “Crimson Circle” (Graph Style) to show the marker Style for Graph A pop-up.   You can change the Color, Type and Size for Graph A marker.   Click on Apply to save the changes.

     X Axis 

  • Enter values in Minimum, Maximum and Major Div to set the X Axis scale and divisions. Leave these values empty for automatic scaling.

     Y axis

  • Enter values in Minimum, Maximum and Major Div to set the Y Axis scale and divisions. Leave these values empty for automatic scaling.

     Curves & Error Bars       

  •  Click on “Linear” (Curve Fit) for Graph A to show the Curvefit Selection for Graph A pop-up.  For this example, “Linear” is selected from the Selection list.  Click on Apply to save the changes.

    Edit Chart Toolbar Options

  •  Print Chart prints your chart.
  •  Download Image downloads your chart as an SVG(Scalable Vector Graphics) file or image file(PNG, JPEG, TIF, PDF).
  •  Drawing Objects customize your chart with labels, lines, arrows, circles, images, and logos.
 Getting Started: