Correlation is closely related to [b]Least Squares Regression[/b]. Why is it called the Least Squares Regression?[br][br]Drag the two "Drag Me!" points to fit a line of best fit between the points this should be when the sum of the squares of the residuals is as small as possible. [br][br]Once you are satisfied that you can not make the sum of squares any smaller, click on the check box to see the true regression line.