U.S. Domestic Travel The graph that follows gives the number of millions of persons who to...

U.S. Domestic Travel The graph that follows gives the number of millions of persons who took trips of 50 miles or more for the years 2000 through 2008.

a. Find the equation of the line which is the best fit for these data, with x equal to the number of years after 2000 and y equal to the millions of persons.

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b. Use the model to estimate the number of persons who took trips in 2010.

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c. In what year does the model estimate the number of people taking trips as 1737.3 million?