Examine the rise of the price of milk from 1997 to 2008. The average price of a gallon of whole milk in January 1997 was $2.67, and in January 2008, the average price of a gallon of whole milk was $3.87 according to Consumer Price Index. Use the coordinates (1997, 2.67) and (2008, 3.87) to find the slope, or rate of change, between the two points. Describe and show how you arrived at your answer. Express your answer as a decimal rounded to the nearest hundredth. What does this answer mean the real world?

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