A linear algebra course is the bare minimum (and frequently it can be enough). You can pick up any textbook and that would give you good enough preparation.
After that you probably will have enough domain knowledge to choose what course to take next yourself.
If I don't really remember what all was in my Linear Algebra class from 15 years ago, but have a working knowledge from graphics would that work, or would I need more of a theoretical background in linear algebra do you think?
After that you probably will have enough domain knowledge to choose what course to take next yourself.