Mary is a corn farmer in Iowa. If she does not irrigate his field, she can produce 120 bushels  of corn per acre. If she applies 4 inches of irrigation water, she can produce 140 bushels of  corn per acre. The application of 8, 12, and 16 inches of irrigation water can result in 160,  180, and 200 bushels of corn per acre, respectively. Graph the relationship between the  amount of water applied and corn yield for Mary (Assume a straight-line relationship).  Find and interpret the slope and Y intercept

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