The statement is false.
Solution:
Let us define function to find f(x) is a function or not.
Definition of function:
A relation from a set x to a set y is called a function if each element of x is related to exactly one element in y.
In the given function,
{0, 3, 6, 9} are called domain of the function.
{0, 1, 3} are called range of the function.
Here 0 is related to 2 element in y.
So, it is not a function.
The statement is false.
