y: Your current class % as a decimal

x:  The grade you need to get on the final exam to earn the desired grade

Grade Desired

Formula

Examples

A

The 89.5% is the lowest A

I currently have 86.7% can I earn an A? (so y=.867)

This means I need 105.4% on the final exam to earn an A,

NOT POSSIBLE!

B

The 79.5% is the lowest B

I currently have 78.4% can I earn a B? (so y=.784)

This means I need 85.7% on the final exam to earn a B

C

The 69.5% is the lowest C

I currently have 67.3% can I earn a C? (so y=.673)

This means I need 82% on the final exam to earn a C

D

The 59.5% is the lowest D

I currently have 55.4% can I earn a D? (so y=.554)

This means I need 82.7% on the final exam to earn a D