Since Exercises use real data, they are best answered with technology.
Cost and Usage of Fuel The accompanying table shows the 1999 price of a gallon (in U.S. dollars) of fuel and the average miles driven per automobile for several countries. (Source: U.S. Dept. of Transportation)
Country | Price per gallon | Average Miles per automobile |
France | $4.01 | 9090 |
Germany | $3.78 | 7752 |
Japan | $3.65 | 6009 |
Sweden | $4.22 | 9339 |
United Kingdom | $5.13 | 10,680 |
(a) Find the straight line that provides the best leastsquares fit to these data.
(b) In 1999, the price of gas in Canada was $2.04 per gallon. Use the straight line of part (a) to estimate the average number of miles that automobiles were driven in Canada.
(c) In 1999, the average miles driven in the United States was 11,868. Use the straight line of part (a) to esti-mate the 1999 price of a gallon of gasoline in the United States.
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