Y = (m-2) x ^ 2n + 1-m + n for M why, n why is a positive proportion function

Y = (m-2) x ^ 2n + 1-m + n for M why, n why is a positive proportion function

Positive scale function
So the degree of X is zero
So 2n + 1 = 1
-m+n=0
So n = 0, M = 0