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Look at this set of ordered pairs: (3,18)(15,9)(13,14)(18,12)(3, 18) (15, 9) (13, 14) (18, 12) Is this relation a function?? Choices:[[yes][[\text{yes}][no]][\text{no}]]

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Full solution

Q. Look at this set of ordered pairs: (3,18)(15,9)(13,14)(18,12)(3, 18) (15, 9) (13, 14) (18, 12) Is this relation a function?? Choices:[[yes][[\text{yes}][no]][\text{no}]]
  1. Check xx-values for repeats: Check xx-values for repeats: 33, 1515, 1313, 1818.
  2. No repeats in xx-values: No repeats in xx-values, so each xx is paired with only one yy.
  3. Relation is a function: Since each xx is paired with only one yy, the relation is a function.

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