Question: Billy can produce either good x (cake) or good y (donuts). In one hour, he can produce 4 units of cake. Alternatively, in one hour, he can produce 2 donuts. Sally can produce either 6 units of cake or 2 donuts in one hour.
Draw the PPF for the Billy + Sally economy as a whole (like in question below). Put cake on the horizontal axis and donuts on the vertical axis.
What is the slope of the PPF when the quantity of cake = [a random number]?