Two Vending Machines Sit Side by Side in a A College

Two vending machines sit side by side in a a college dorm. One machine sells Coke products and the other sells Pepsi products. Daily sales of coke products, based on the prices of the products in the two machines can be modeled by the equation cans per day, when Coke products cost $c and Pepsi products cost $p. Find and interpret

A) means that when the price of Pepsi products is $0.80 and the price of Coke products is $0.90, if the price of Coke products increases by $1 while the price of Pepsi products remains constant, then the daily sale of Coke products will decrease by about 81 cans.
B) means that when the price of Pepsi products is $0.80 and the price of Coke products is $0.90, if the price of Coke products increases by $0.90 while the price of Pepsi products remains constant, then the daily sale of Coke products will decrease by about 81 cans.
C) means that when the price of Pepsi products is $0.80 and the price of Coke products is $0.90, if the price of Pepsi products increases by $1 while the price of Coke products remains constant, then the daily sale of Coke products will decrease by about 81 cans.
D) means that when the price of Pepsi products is $0.80 and the price of Coke products is $0.90, if the price of Pepsi products increases by $0.80 while the price of Coke products remains constant, then the daily sale of Coke products will increase by about 194 cans.
E) means that when the price of Pepsi products is $0.80 and the price of Coke products is $0.90, if the price of Pepsi products increases by $1 while the price of Coke products remains constant, then the daily sale of Coke products will increase by about 194 cans.

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