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5 September, 12:20

Which set of ordered pairs represents a function?

{ (0,1), (2, - 1), (-7,6), (0,3) }

{ (-5,6), (9,4), (-7, 2), (-9,6) }

{ (6, - 6), (-7,8), (9,3), (9, - 5) }

{ (-2,1), (-1,-9), (-2,-6), (2, - 2) }

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Answers (2)
  1. 5 September, 12:32
    0
    the second set, { (-5,6), (9,4), (-7, 2), (-9,6) }

    Step-by-step explanation:

    a function is when the domain has only one range, in all the sets there are multiple domains (x) with diff ranges (y), but not in the second one.
  2. 5 September, 12:42
    0
    There is a rule for functions:

    One input (x-value) can only have one output (y-value).

    If one input has more than one output, it is not a function.

    (This doesn't apply to outputs, one output can have more than one input and still be a function)

    (0,1), (2, - 1), (-7,6), (0,3) }

    This isn't a function because the input 0 has more than one output of 1 and 3

    { (-5,6), (9,4), (-7, 2), (-9,6) }

    This is a function because each input has only one output.

    { (6, - 6), (-7,8), (9,3), (9, - 5) }

    This is not a function because the input 9 has more than one output of 3 and - 5

    { (-2,1), (-1,-9), (-2,-6), (2, - 2) }

    This is not a function because the input - 2 has more than one output of 1 and - 6
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