Explanation:
for 18 it would be a vert stretch 2 and a horizontal reflection over the y axis because the x is negative, after you would move it down 2. ( use 0,4,9 for the parent table)
19 has a vertical compression of 1/2 so you would have to multiply all the Y numbers on the new table by 1/2 (before you add or subtract, if needed) then you would go left 2 and I don't see a Vertical change so that should be all.