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Look at this set of ordered pairs:\newline(7,11)(7, 11)\newline(7,−15)(7, -15)\newline(18,11)(18, 11)\newlineIs this relation a function?\newlineChoices:\newline(A) yes\newline(B) no

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Full solution

Q. Look at this set of ordered pairs:\newline(7,11)(7, 11)\newline(7,−15)(7, -15)\newline(18,11)(18, 11)\newlineIs this relation a function?\newlineChoices:\newline(A) yes\newline(B) no
  1. Check xx-values: Check xx-values in the pairs: (7,11)(7, 11), (7,–15)(7, –15), (18,11)(18, 11).\newlinexx-values are 77, 77, 1818.
  2. See for repetition: See if xx-values repeat.\newlineFirst and second pair have same xx-value of 77.
  3. Decide on function status: Decide if it's a function.\newlineA function can't have same xx with different yy's.\newlineSince 77 is repeated with different yy's, it's not a function.

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