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 .