College students are graduating with the highest debt burden in history. The bar graph shows the mean,
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College students are graduating with the highest debt burden in history. The bar graph shows the mean, or average, student-loan debt in the United States for five selected graduating years from 2001 through 2013.
Here are two mathematical models for the data shown by the graph. In each formula, D represents mean student-loan debt, in dollars, x years after 2000.
a. Which model better describes the data for 2001?
b. Does the polynomial model of degree 2 underestimate or overestimate mean student-loan debt for 2013? By how much?
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