Which statement describes the relationship between the function and its inverse?

The range of both f(x) and f–1(x) is all real numbers.
The domain of both f(x) and f–1(x) is all real numbers.
The range of f(x) is y > 0 and the domain of f–1(x) is x > 0.
The domain of f(x) is x > 0 and the range of f–1(x) is y > 0.