Im taking this right now so Im not 100% sure
y-intercept: 2 because the slope is passing through 2.
slope: take points (-1,2) and (-1,3)
m=-1/2 or 1/-2(there is no difference)
so the slope is -1/2
in slope intercept, its going to be:y=-1/2x+2
btw, i noticed that the point isn't -1 it's 0.75 i think. Substitute the -1 for -0.75(-3/4) and finish the math. Sorry.