Cost of Gasoline The average price of a gallon of regular gasoline in the United States
Chapter 1, Problem 117(choose chapter or problem)
Cost of Gasoline The average price of a gallon of regular gasoline in the United States on January 18, 2010 was $2.739, and one year earlier, the average price of a gallon of regular gasoline was $1.847. Suppose that the Smith family drives a 2010 GMC Yukon 1500 4WD, which has a fuel usage of 17 miles per gallon (city and highway combined). (a) Find a linear equation that gives this familys annual fuel cost C as a function of the number x of miles driven in one year, using the price of a gallon of regular gasoline on January 18, 2010. (b) Find a similar equation using the price of a gallon of regular gasoline one year earlier. (c) Assuming the Smith family drives 15,000 miles annually, determine their annual fuel cost using the price of gasoline on January 18, 2010. (d) Determine the Smith familys annual fuel cost using the price of gasoline one year earlier. (e) What is the difference between these annual fuel costs? Source: Energy Information Administration, United States Department of Energy and www.fueleconomy.gov
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