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Treat the data as ordered pairs. From the graph, write the years as x - coordinate and the price as y - coordinate.
From the graph, the two points are .
Substitute the values of in the slope formula .
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To write the line equation, we can use either of the two given points.
Consider the point .
Substitute in point - slope form equation or .
Apply distributive property: .
Add 152.5 to each side.
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The sample answer is .
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