The short answer is yes Q is situated 3/2 units below P. The question is, first of all, not phrased as a question. It is also not phrased in mathematical terms. "If Q is a point on L lying 2 units to the right of P" is not precisely what we are talking about. Q is a point whose x coordinate is 2 greater than P's. The answer is really that Q's y coordinate is 3/2 less than P.s.
