Let's do another example. The scatter plot below displays a set of bivariate data along with its least squares regression line. Same idea. Consider removing the outlier 10, negative 18, so we're talking about that point there, and calculating a new least squares regression line. So what would happen this time? So as is, without removing this outlier, we have a negative slope for the regression line. So we're dealing with a negative r. So we already know that negative one is less than r, which is less than zero.