The function y = (M-4) x + 3M + 2 is known. If it is a positive proportional function, then M = ()

The function y = (M-4) x + 3M + 2 is known. If it is a positive proportional function, then M = ()

In general, the relationship between two variables X and y can be expressed as a function of y = KX (k is a constant and K ≠ 0), then y is called the positive proportional function of X
therefore
3m+2=0
m=-2/3