Refer to the data on garbage in Exercises 3.31.

(a) Calculate the correlation coefficient between the amount of garbage in millions of tons and the population size in millions.

(b) Based on your calculation in part (a), give the correlation coefficient between the amount of garbage in pounds and population size in number of persons. Explain your answer. [Hint: Recall that there are 2000 pounds in a ton so (number of pounds)
2000  (number of tons).]