Cost of Public College Education The table lists the average annual costs (in dollar...

Cost of Public College Education The table lists the average annual costs (in dollars) of tuition and fees at public four-year colleges for selected years.

(a) Use a calculator to find the least-squares regression line for these data, where x = 0 corresponds to 1993, x = 2 corresponds to 1995, and so on.

(b) Based on your result from part (a), write an equation that yields the same y-values when the exact year is entered.

(c) Estimate the cost of tuition and fees in 2009 to the nearest hundred dollars.