In 2005 the average annual tuition and fees for attending a private college or university was $21,000.

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In 2005 the average annual tuition and fees for attending a private college or university was $21,000. This cost rose to about $32,000 in 2015, as illustrated in the figure. image


(a) Find the slope-intercept form of the line pass- ing through (2005, 21,000) and (2015, 32,000). Interpret the slope. 


(b) Use the equation to estimate the cost of attend- ing a private college in 2013.

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