Given the function y = (m-1) x + 1-3m, when m is of any value, y is a linear function of X and Y is a positive proportional function of X

If y is a linear function, then the coefficient of X M-1 ≠ 0
So m ≠ 1
If y is a positive proportional function, then the constant 1-3m = 0
So m = 1 / 3

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