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}

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