One way to find if there is an apparent correlation in this situation is to find if the table follows the structure of a function.
To follow the structure of a function means that - in this particular case - Eduardo would have to score differently from (4 hours practiced) to (3 hours practiced), while in this case he scored nothing <em>on each </em>round. So therefore this does not follow the strict requirements of a function, and is therefore non-proportional - even if you look at it from an entirely different perspective!
Hopefully this helped a bunch! Tell me if you need any further assistance...
