The bar graph shows the average dormitory charges at public and private four-year U.S. colleges. Use the

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The bar graph shows the average dormitory charges at public and private four-year U.S. colleges. Use the information displayed by the graph to solve Exercises 65–66.image



a. Use the numbers shown by the bar graph to find the total dormitory charges at public colleges for a four-year, period from the school year ending in 2010 through the school year ending in 2013.


b. The model an = 225n + 4357 describes dormitory charges at public colleges in academic year n, where n = 1 corresponds to the school year ending in 2010, n = 2 to the school year ending in 2011, and so on. Use this model and the formula for Sn to find the total dormitory charges at public colleges for a four-year period from the school year ending in 2010 through the school year ending in 2013. Does this underestimate or overestimate the actual sum that you obtained in part (a)? By how much?

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College Algebra

ISBN: 9780134453262

7th Edition

Authors: Robert F Blitzer

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