Can you use a memory card on a non digital slr if the slr has a card slot btw the slr is a minolta dynax 5xi?

Those memory card slots on Minolta cameras for READING (not for writing) cards that comes preloaded with Minolta's different exposure modes that we set by turning a dial in modern cameras (with a built-in memory). So, the answer to your question is you can insert a memory card into that slot but you won't be able to save the pictures on it like a digital camera.