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3 November, 15:44

Identify the relation that is also a function. A. { (1, 0) (2, 3) (3, - 2) (1, 6) } B. { (3, 2) (3, - 2) (3, 6) (3, 8) } C. { (-1, 1) (0, 0) (1, 1) (2, 4) } D. { (3, 4) (2, 3) (3, 6) (2, 0) }

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  1. 3 November, 16:51
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    C is the function.

    Step-by-step explanation:

    C is the only relation which is one-to-one. Each value of x is different and maps to a different value of y.

    A for example is one-to-many because 1 maps to 0 and 1 maps to 6 so it is not a function.
  2. 3 November, 17:08
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    C. { (-1, 1) (0, 0) (1, 1) (2, 4) }

    Step-by-step explanation:

    A relation is not a function if values of the independent variable are repeated.

    A: (1, - ) appears twice

    B: (3, - ) appears 4 times

    C: a function

    D: (3, - ) appears twice; (2, - ) appears twice
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