Walmart revenue, part 2.

Walmart is the second largest retailer in the world. The data file on the disk holds monthly data on Walmart’s revenue, along with several possibly related economic variables.

a) Using computer software, find the regression equation predicting Walmart revenues from the Retail Index, the Consumer Price index (CPI), and Personal Consumption.

b) Does it seem that Walmart’s revenue is closely related to the general state of the economy?