The following data describe U.S. motor vehicle travel and fuel consumption from 2002 through 2006. The data represent billions of gallons consumed and billions of miles traveled, respectively.

a. Determine the least-squares equation line for predicting fuel consumption on the basis of driving miles.
b. Determine and interpret the coefficients of correlation and determination.
c. If motor vehicle travel during a year were 3100 billion miles, what level of fuel consumption would be predicted?

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2002 2003 2004 2005 2006 Fuel Consumed 168.7 170.0 173.5 74.8 174.9 Miles Traveled 2856 890 2965 2989 3014