Slide to the next stage, then move the blue points to find the line of best fit for the points shown. Click the button for a new set of points.
The object is to estimate the 'least squares' line. Stage 1 shows you the points. Stage 2 gives you the opportunity to estimate the line of best fit. Stage 3 plots the residuals. Stage 4 give you the 'square' of the residuals. Stage 5 reveals the true least squares regression line.