Final answer:
The function f(x) = x has a domain and range of all real numbers and its end behavior is that as x approaches infinity, f(x) also approaches infinity.
Step-by-step explanation:
The given function is f(x) = x. The domain of the function is all real numbers, which means that x can take any real value. The range of the function is also all real numbers, meaning that f(x) can output any real number.
The end behavior of the function is as x approaches infinity, f(x) also approaches infinity.