Since 1985, the average annual cost y (in dollars) for tuition and fees at a public two-year colleges in...

Since 1985, the average annual cost y (in dollars) for tuition and fees at a public two-year colleges in the United States has increased about 6.5% per year. In 1985, tuition and fees were an average of $584 per year. a. Write an equation to model the cost of two-year colleges. Predict the average annual cost for 2015. b. Predict the average annual cost for the year you plan to graduate from high school.