Cautions about correlation

A data set was graphed using a scatterplot 30 25 20 15 10 5 0 5 10 15 20 25 30 The correlation coefficient, r, is 0.813 Which of the following statements explains how the correlation is affected? . a.) It is affected by inappropriate grouping. D.) It is affected by an influential point. . C.) It is not affected. d.) It is affected by non-linearity. O