At grocery store, the price of a watermelon is determined by how many pounds the watermelon weighs. The price of the watermelon that weighs 7.3 pounds is $4.38. Write an equation that can be used to determine the price, p. in dollars, of any watermelon based on the number of pounds, w, the watermelon weighs.

Determine the cost of a watermelon that weighs 8.5 pounds.

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