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It is known that y + m is positively proportional to x + n (M and N are constants). What is the functional relationship between Y and X It is known that y + m and X + n (M and N are constants) are in positive proportion. What is the functional relationship between Y and X? If x = 3, y = 5; if x = 5, y = 11, try to find the functional relationship between Y and X
Let y + M = K (x + n) (k is not equal to 0)
Then y = KX + kn-m
To be a function of degree
So 5 = 3K + kn-m 11 = 5K + kn-m
So k = 3
So 3N-M = - 4
So y = 3x-4
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