Trace on a Function or Fitted Line

How To... > Work with Graphs > Add Lines and Functions to Graphs > Trace on a Function or Fitted Line

When you have functions or fitted lines plotted on a graph, you can force the cursor to stay on the line and have it show its coordinates.

1.	Move the cursor over the line or curve.

The cursor changes and its position on the line is shown with a red dot.

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2.	When this dot is visible, hold down the mouse button; the dot will trace the function and its coordinates will appear in the plot area.

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Because clicking on a movable line selects it for dragging, this feature is not available for movable lines. Instead, you can plot a static line (using Plot Function) and trace that.