Answer:
X is independent, Y is dependent.
Explanation:
For every X, you are predicted to get Y.
For every "mile", you burn 100100100 "calories"
Therefore, your X is independent and your Y is dependent.
Whenever you have a "For Every" statement, think about what you are putting in, in order to get something out.
Additional help: For every dog that barks, there is 20 cats that meow. Dog = Independent because nothing is impacting it. Cat = Dependent because it is being impacted by the dog.