Question

What are the domain and range of the function {(3, 1), (5, –1), (9, –1), (2, 7), (–4, 1)}?

A.
Domain: {1, 7}; Range: {3, 5, 9, 2 }

B.
Domain: {3, 5, 9, 2 }; Range: {1, 7}

C.
Domain: {3, 5, 9, 2, –4}; Range: {1, –1, 7}

D.
Domain: {1, –1, 7}; Range: {3, 5, 9, 2, –4}

Answer 1

The answer is C. The domain is just the values of x of those ordered pairs. The range is the values of y, since some values are repeated, just use the value that is repeated once.