Given that y + m and X + n (constant) are in positive proportion, try to judge the functional relationship between Y + m and X + n Given that y + m and X + n (m.n constant) are in positive proportion, try to judge the functional relationship between Y and X. if x = 3, y = 5, x = 5, y = 11, try to find the sum function expression

Given that y + m and X + n (constant) are in positive proportion, try to judge the functional relationship between Y + m and X + n Given that y + m and X + n (m.n constant) are in positive proportion, try to judge the functional relationship between Y and X. if x = 3, y = 5, x = 5, y = 11, try to find the sum function expression

It is known that y + M = K (x + n)
So we get y = KX + kn-m
Since m and N are constants, kn-m is also a constant,
Let kn-m = B, so y = KX + B
So y is a function of X
When x = 3, y = 5, so 5 = 3K + B
When x = 5, y = 11, so 11 = 5K + B
From the above two equations, k = 3, B = - 4
So y = 3x-4