A supermarket sells a refrigerator with a purchase price of 2000 yuan at 2400 yuan, with an average of 8 refrigerators sold every day. The survey shows that every 50 yuan reduction in the price of this refrigerator will result in an average of 8 refrigerators

A supermarket sells a refrigerator with a purchase price of 2000 yuan at 2400 yuan, with an average of 8 refrigerators sold every day. The survey shows that every 50 yuan reduction in the price of this refrigerator will result in an average of 8 refrigerators

Analysis: (1) according to the meaning of the question, it is easy to find the function expression between Y and X. (2) given the analytic expression of the function, let y = 4800, then we can get the value of X from the actual situation. (3) using x = - to get the value of X, then we can get the maximum value of Y. (1) according to the meaning of the question, we can get y = (2400-2000-x) (8 + 4 ×), that is, y =