The graph of g(x) is the graph of f(x) translated 4 units down.
Remember:
if we have the graph of a function f(x); then : f(x)+b ; is the graph f(x) translated b units up f(x)-b; is the graph f(x) translated b units down. f(x+b); is the graph f(x) translated b units left. f(x-b); is the graph f(x) translated b units right.