What is the domain of the function represented by these ordered pairs? {(–2, 1), (0, 0), (3, –1), (–1, 7), (5, 7)}

The domain is the set of all first coordinates (x-values) in the ordered pairs. These are −2, 0, 3, −1, and 5; arranging them in order gives {−2, −1, 0, 3, 5}. Therefore, the correct choice is A, {−2, −1, 0, 3, 5}.

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