The model an = 395n + 5419 describes the cost of tuition and fees at public colleges in academic year n, where n = 1 corresponds to the school year ending in 2007, n = 2 to the school year ending in 2008, and so on.
Use this model and the formula for Sn to find the total cost of tuition and fees at public colleges for a four-year period from the school year ending in 2007 through the school year ending in 2010.
How does this compare with the actual sum you obtained in part (a)?
**** i can attach part a if you need it. but, I was never given the bar graph that it says in part a. hopefully one of you have done this question before and can help me out. Thanks in advance!