Find y intercept for (-2,4)(6,4) then

(0,6) and (8,6). It it possible

Really no work needed here.

Notice for both pairs, the y values are the same.
So in both cases we would have a horizontal line, and
the y-intercept would simply be the y value of the 2 points

So for the first pair, the y-intercept is 4
for the second pair, the y-intercept is 6

plot the points to show.