Illustration of leverage

Use this diagram to explain that an outlier may not be evident as a large residual if it is a high-leverage point.

The cross on the far right can be dragged with the mouse. Initially, the diagram shows what we would ideally have hoped to see in the residuals.

This is not what actually happens. Choose What you actually get... from the pop-up menu and drag the point again.

The point's residual is smaller than you might expect — especially when its x-value is around 4.