Question

Determine if the set of points (−1,3), (2,5), (3,8), and (4,5) is a function. Explain. A. The set of points is a function because each value in the domain corresponds to exactly one value in the range. B. The set of points is a function because the range consists of the value 5 two times. C. The set of points is not a function because each value in the domain corresponds to exactly one value in the range. D. The set of points is not a function because the range consists of the value 5 two times.

Answer 1

yes - each domain element is used exactly once.

review functions ...

Answer 2

{(7,4),(−4,0),(4,−3),(−7,7)}
{(−8,−7),(4,−2),(2,9),(−8,8)}{(−8,−7),(4,−2),(2,9),(−8,8)}
{(−9,−2),(8,−2),(2,−5),(−8,4)}{(−9,−2),(8,−2),(2,−5),(−8,4)}
{(−7,5),(7,9),(−3,5),(3,3)}{(−7,5),(7,9),(−3,5),(3,3)}