![]() After removing any outliers, select a correlation coefficient that’s appropriate based on the general shape of the scatter plot pattern. However, we only calculate a regression line if one of the variables helps to explain or predict the other variable. In a scatterplot, I would like to display both the correlation coefficient along an equation describing the relationship between x and y. There are many different correlation coefficients that you can calculate. This line can be calculated through a process called linear regression. If we think that the points show a linear relationship, we would like to draw a line on the scatter plot. The linear relationship is strong if the points are close to a straight line, except in the case of a horizontal line where there is no relationship. In this chapter, we are interested in scatter plots that show a linear pattern.
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