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Look at this set of ordered pairs:\newline(12,8)(12, 8)\newline(12,9)(12, 9)\newline(−5,9)(-5, 9)\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(12,8)(12, 8)\newline(12,9)(12, 9)\newline(−5,9)(-5, 9)\newlineIs this relation a function?\newlineChoices:\newline(A) yes\newline(B) no
  1. Look at xx-values: Look at the xx-values in the ordered pairs.\newlineOrdered pairs: (12,8)(12, 8), (12,9)(12, 9), (−5,9)(-5, 9)\newlinexx-values: 1212, 1212, −5-5
  2. Check for repetition: Check if any xx-value is repeated.xx-values: 1212, 1212, –5–5 The xx-value 1212 is repeated.
  3. Determine if function: Determine if the relation is a function.\newlineA function must have only one yy-value for each xx-value.\newlineSince the xx-value 1212 has two different yy-values (88 and 99), it's not a function.

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