statistics
posted by RGCLARK on .
A scatter plot would be useful for
A. Showing the relative number of sales of four different brands of blank DVDs
B. Showing the trend of sales, over time, of five different brands of blank DVDs
C. Showing the relationship between the sales of blank CDs and blank DVDs
D. Showing the top selling brands of blank DVDs

C.
A scatterplot is a useful summary of a set of two variables. It gives a picture of the relationship between the two.