y= 2x - 4
y= 2x + 4
y= -1/2x -4
y= 1/2x+4

Answer:
y=1/2x+4
Step-by-step explanation:
1 square down 2 square to the side you put that in a fraction 1/2 which is the gradient and the y-intercept is what passes through y which is 4