The average annual tuition and fees at all 4-year institutions in the US in 2002 was $17,708 and in 2011 was $ 23,114. Let y be the average tuition and fees in the year x, where x = 0 represents the year 2002.

a) What is a linear equation, in slope-intercept form, that models the growth in average tuition and fees at all 4-year institutions in the US in terms of the year x.

b)Use this equation to predict the average tuition and fees at 4-year institutions in the US in the year 2025.

c)Explain what the slope of this line means in the context of the problem.