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}