The oval on the left side is the domain of the function, whereas the oval on the right is the codomain of the function. One can infer it from the arrows; look how they go from the oval on the left to the one on the right.
We say that a is in the range of the function if it exists b in the domain such that f(b)=a
Therefore, 5 is in both the domain and range of the function since f(2)=5. The answer is true.