Suppose that f has a domain of [9, 18] and a range of [6, 18]. What are the domain and range of the functions below?
(a) y = f(x) + 4
Domain: __________
Range: ________________
(b) y = f(x + 4)
Domain: __________
Range: ___________
(c) y = f(4x)
Domain: __________
Range: ___________
(d) y = 4f(x)
Domain: __________
Range: _________