College football is big business, with coaches' pay in millions of dollars. The file College Football contains the 2013 total athletic department revenue and 2014 football coaches' total pay for 108 schools. (Data extracted from usat.ly/1uws90v and usat.ly/1DOl0v3.)

a. Compute the covariance.

b. Compute the coefficient of correlation.

c. Based on (a) and (b), what conclusions can you reach about the relationship between coaches' total pay and athletic department revenues?