Slide to the next stage, then move the blue points around the perimeter to find the line of best fit for the points shown. [br]Then keep advancing stages to see how well you do.[br]Click the button for a new set of points.

The object is to estimate the 'least squares' line. [br]Stage 1 shows you the points.[br]Stage 2 gives you the opportunity to estimate the line of best fit. [br]Stage 3 plots the residuals.[br]Stage 4 give you the 'square' of the residuals. [br]Stage 5 reveals the true least squares regression line.