SOLUTION: Which of the following relations is a function? A.{ (1, 2), (1, 3), (2, 8), (3, 9) } B.{ (1, 2), (2, 3), (3, 4), (4, 5) }
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Question 888761: Which of the following relations is a function? A.{ (1, 2), (1, 3), (2, 8), (3, 9) } B.{ (1, 2), (2, 3), (3, 4), (4, 5) } C.{ (3, -1), (2, 3), (3, 4), (1, 7) } D.{ (3, 0), (4, -3), (6, 7), (4, 4) }
Answer by jim_thompson5910(35256) (Show Source): You can put this solution on YOUR website!
A.{ (1, 2), (1, 3), (2,8), (3, 9) }
Not a function since x = 1 maps to y = 2, y = 3
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B.{ (1, 2), (2, 3), (3, 4), (4, 5) }
This is a function since every x maps to exactly one y value.
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C.{ (3, -1), (2, 3), (3, 4), (1, 7) }
Not a function since x = 3 maps to y = -1, y = 4
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D.{ (3, 0), (4, -3), (6, 7), (4, 4) }
Not a function since x = 4 maps to y = -3, y = 4
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