Explanation:
slope = rise/run = (y2-y1)/(x2-x1)
= (3-2)/(0-3)
=(1)/(-3)=-1/3
The intercept is given in one of the points, (0.3).
y=mx+b
y=(-1/3)x+3
I can't tell if this is one of your options bc I think the copy paste didn't quite come through correctly.