It is very likely that the effort our student must exert to raise her GPA from a 2.0 to a 3.0 will be greater still than that required to raise it from a 1.0 to a 2.0. Our reasoning is the same as before. The first few hours spent in academic efforts will be spent in those activities that are most efficient at raising grades, and will be spent mastering the material and skills that come most easily. Earning a 3.0 (a B average) means mastering a high percentage of the core material and skills in every course. This usually requires considerable effort.
The student we are considering can attain a 3.0 at the point labeled B. She will have to give up 20 additional hours of leisure a week in order to raise her grades from a 2.0 to a 3.0. The total time required to earn a 3.0 is about twice that required to earn a 2.0, and the added time needed each week to increase her GPA from a 2.0 to a 3.0 is about the same as the total time required to earn a 2.0.
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