To determine whether the mapping diagram represents a function, we need to check if each input (element from the domain) is mapped to exactly one output (element from the codomain).
If any input is connected to more than one output in the diagram, then it does not represent a function.
Since I can't see the mapping diagram you're referring to, I can't provide a definitive answer. However, if each input maps to only one output, then the statement is True. If any input maps to more than one output, then the statement is False.
You can use this criterion to decide on the correct response based on the mapping diagram you have.