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The graph shows the value of a car at different years after Joanna purchased it.Which answer is the best estimate for the average rate of change between year 9 and year 14?

The graph shows the value of a car at different years after Joanna purchased it.Which-example-1

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The average rate of change can be found through the formula


average=(f(b)-f(a))/(b-a)

then, looking at the graph, the points that are needed are (14,750) and (9,1400).

Using the formula,


\begin{gathered} average=(1400-750)/(9-14) \\ average=(650)/(-5) \\ average=-\text{\$}\frac{130}{\text{year}} \end{gathered}

User KpTheConstructor
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