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Answer to Question #22805 in Trigonometry for Kristen Woods

Question #22805
Determine if the given relation is function or not. Give its domain and range.

16. (-1,2),(1,3),(-1,4),(2,5)

17. (1,1),(2,2),(3,3),(4,4)
Expert's answer
16. (-1,2),(1,3),(-1,4),(2,5)
is not function because for x=-1 exist two y1=2, y2=4
17.(1,1),(2,2),(3,3),(4,4)
function because for every x exist one value of y Domain={1,2,3,4} Range={1,2,3,4}

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