What is the domain of the relation described by the set of ordered pairs {(–2, 8), (–1, 1), (0, 0), (3, 5), (4, –2)}?
 

{–2, 0, 1, 5, 8}

{–2, –1, 0, 4, 5}

{–2, –1, 0, 1, 5}

{–2, –1, 0, 3, 4}