Determine the analytic formula of the function y = KX + B. y is proportional to x, x = 5, y = 6

Determine the analytic formula of the function y = KX + B. y is proportional to x, x = 5, y = 6

Y is proportional to x, so B = 0
X = 5, y = 6. For generations, k = 1.2
The original function is y = 1.2x

Given that the image of the function y = KX + B passes through point a (4.3) and point B (2. M), and is parallel to the image of the first-order function y = x + 1, the expression of the first-order function image and the expression of M are obtained
I can draw that image by myself. Thank you

First, point a is brought in, 3 = 4K + B
Because two functions are parallel, then their K is equal, so k = 1
3=4*1+B b=-1
So the original formula is y = X-1
When x = 2, M = 1
I can't give the image here. The owner can draw by himself. If not, hi me