EconWeb - Production Possibilities Frontier    It's unlikely that our student could move from a 1.5 to a 3.0 GPA by giving up another 15 hours of fun. That is, a point like D is probably not available to her.

   To earn a 3.0 might require significant amounts of study and work. In other words, the opportunity cost of 1.5 grade points in terms of fun might be higher the higher your grades are. If so, she would only attain a 3.0 at a point like E. The amount of fun she would have to give up to earn a 3.0 would depend on the student, the school, and the courses she's taking.

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