- The production possibility curve for peter to contact his friends via phone call vs weblog gives the combination of two ways to contact his friends with total remains constant.
- The trade-off between two ways " Pareto Optimality ". The maximum number of phone calls to contact his friends occurs when he "forgives" the method of weblog completely.
- This point on PPC is the intercept on the vertical axis ( Phone ). Read off the intercept on the "Phone" axis.
