To state: The hypothesis and prediction that the given experiment tested.
The graph shows the average time taken by mice to learn to run through a maze. The experiment was performed on mice in two situations- with food reward and no reward.
In a controlled experiment, only one variable is manipulated to test its effect. Independent variable is adjusted to check its effect on dependent variable. These are the experimental variables. Other variables are constant, that is, controlled.
Sorry about that. What wasn’t helpful?