Description of Problem:

My student has to find the line passing through (5,10) and

(-7,10) in the form Ax+By+C=0. Clearly y-10=0 describes the line, so A=0, B=1, C=-10. When she enters these values, A is accepted and B & C are marked wrong. The "correct" answers expected are B=12 & C=-120. This is absurd. No student should have to divine which multiple of the coefficients the system is expecting. The relatively prime values should be accepted as the logical answer. The algorithm shown in the problem code does not seem to properly account for the case when one of the coefficients is zero by dividing by the GCD properly.

Is there no way for me as the instructor to override the system's grading of the problem and force acceptance of her answers?? Or to at least manually enter a different score on her progress report? I have already submitted a bug report on this. Thank you --