Production possibilities frontier (PPF) graph showing a curve extending from Point A on the positive y-axis to Point D on the positive x-axis. The x-axis represents "Cars" and the y-axis represents "Army Tanks". Point A is (0,12). Point B is (1,10). Point C is (2,6). Point D is (3,0). A curved line connects Points A and D and Points C and D lie on the curve. Point E is (2.5,8) and sits outside the curve. Point F is (1.25,5) and lies inside the curve (but not on the curve).