Point A in the figure is A coordinate plane relates cost along the vertical axis to quantity Q along the horizontal axis, and represents a cost function curve.The curve rises and extends rightward to point (10, $50), extends further, and rises. Point A above the curve is marked at (20, $75). Multiple Choice efficient since it produces 10 units of output at the lowest possible cost. efficient since it produces 20 units of output at the lowest possible cost. inefficient since it produces 10 units of output at a cost greater than the minimum cost. inefficient since it produces 20 units of output at a cost greater than the minimum cost