Question 1191234
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depreciation is a linear function and a $28,550 new car depreciates to a value of $13,500 over a seven-year period, what is the rate of change? 
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Point on a line (0,28550), with slope {{{(13500-28550)/7=-15050/7=-2150}}}.  You can write the equation  (or the function)  in slope-intercept form.