More important, we have a numerical measure that can assess the strength of the linear relationship. We can see that in both cases, the direction of the relationship is positive and the form of the re...More important, we have a numerical measure that can assess the strength of the linear relationship. We can see that in both cases, the direction of the relationship is positive and the form of the relationship is linear. The scale used in a scatterplot can sometimes affect our assessment of strength, so we need to develop a measure for the strength of a linear relationship between two quantitative variables.
