Final answer:
The appropriate way to report a freerider to a professor is to inform them directly.
Step-by-step explanation:
The appropriate way to report a freerider to a professor is to inform the professor directly. This allows the professor to be aware of the situation and take appropriate action. Sharing concerns with classmates can also be helpful, as they may have similar experiences. Confronting the freerider publicly or ignoring the situation are not recommended, as these approaches may escalate the problem or allow it to continue.