well, the way I'd put it is, 6 and 2 are a good cardinal pair to move about to get the midpoint, however the midpoint location uses an ordinal pair, so if we move 6 units over the horizontal and 2 units upwards toward the slanted line, we'd end up at our ordinal location for the midpoint of (-3 , 8). So in essence, if we move half the base and half the height, that's where our ordinal pair is.