I'm having issues with reading this relationship.
Let's take the Professor and Class entities in this example. If I read this from Professor to Class, I would say, "A Professor teaches one to many Classes". If I go the opposite direction, from Class to Professor, I would initially read this as "A Class can be taught by one and only one Professor".
Is this the correct way to describe those relationships in both directions? Or, rather, is the direction from Class to Professor a "many to one" relationship?
I think I may be mixing up two different things (cardinality and relationships), but I'm not entirely sure.