Question

What are the domain and range of the relation (–4, 2), (0, 1), (0, 5), (8, 10)?

A.Domain: {–4, 0, 8}; Range: {2, 1, 5, 10}

B.Domain: {–4, 2, 0, 1, 5, 8, 10}; Range: {–4, 2, 0, 1, 5, 8, 10}

C.Domain: {–4, 0, 5, 10}; Range: {2, 1, 8}

D.Domain: {2, 1, 5, 10}; Range: {–4, 0, 8}

Answer 1

Each point in the relation consists of an x-coordinate followed by a y-coordinate.
The domain is the set that contains the x-coordinates.
The range is the set that contains the y-coordinates.
If the same x-coordinate appears in more than one point, it only shows up in the domain once. The same is true for the y-coordinates and the range.