Experts/ace/trusted /geniuses mee plz

you would use 3x = 78+(x-2)

An outside angle ( 3x) always equals the sum of the 2 opposite inside angles ( 78 & (x-2)

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).