Chapter 1.2, Problem 73E

To determine

To calculate: The equation that relates with the average tuition and fees, y to the number of years after $2001$, x assuming that average tuition and fees increased linearly with respect to time in year $2009$. Also calculate the average tuition and fees in year $2009$ if the average college tuition and fees at four-year public colleges increased from $\$3735$

in $2001$ to $\$8312$ in $2013$. The figure showing the increase is as follows: