Respuesta :
Answer: Really hope this helps you.
Explanation: it depends in what you are using it for if you are using it for math then it means a relation from a set of inputs to a set of possible outputs where the input and the output is related exactly.
Apex Definition: A rule that tells you how one number depends on another. For each input number, there is exactly one output number.
A function takes in something (the input) and gives back something else (the output)
A function takes in something (the input) and gives back something else (the output)