-1/2(2n + 4) +6= -9+4 (2n +1)

Step-by-step explanation:

I'm not sure if this is what you want

look at the picture.

y-intercept for the function on a picture is 4 → point (0, 4).

y-intercept for the function

is for x = 0. substitute:

y-intercept is 8 → point (0, 8).