Final answer:
The function is f(x) = x³.
Step-by-step explanation:
The given function is f(x) = x³. This means that the value of the function is obtained by cubing the input value, x. For example, if x = 2, then f(2) = 2³ = 8. So, the correct answer is option 2) f(x) = x³, which represents the given function.