In the function y = 1 / 3 x, y = 1 / 2 x + 3, y = 1 / 3 x, y = 2 [x-3], the positive proportion function is [] The linear function is []

In the function y = 1 / 3 x, y = 1 / 2 x + 3, y = 1 / 3 x, y = 2 [x-3], the positive proportion function is [] The linear function is []

The positive scaling function is y = one third of X,
The linear function is y = half x + 3, y = 2 [x-3]