The graph of a function is shown: which of the following correctly identifies the set of  outputs?   {(5, –2), (1, –1), (–2, 2), (2, 5)}  {(–2, 5), (–1, 1), (2, –2), (5, 2)}  {–2, –1, 2, 5}  {–2, 1, 2, 5}