Quick question regarding your school's grading policies:
Are professors required to attain a certain GPA for their classes?
At Florida Tech, the professors are supposed to have a GPA of 2.75 for their classes. If it's a little below, the school doesn't do much, but if it's way below, the school will often step in and curve. This is because at an engineering school, you can't go by the conventional 100 90 80 70 etc. scale. I had a 60% in Thermodynamics and that was considered to be an A. And also, truth be told, it looks bad if many of your students are failing.
What your professor may have done is what many professors at my school do. They get the final grades and "adjust" to get their 2.75. You did mention that you thought a lot of people failed the final. It may mean that since he was impressed with her "progress", he chose to bump her up instead of you. It can be pretty subjective, which I'll admit, is rather unfair.
Check with your school's grading policies. If they do things the way my school does, you probably don't have much of an arguement.
