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Look at this set of ordered pairs:\newline(20,0)(20, 0)\newline(9,−14)(9, -14)\newline(−11,0)(-11, 0)\newline(15,0)(15, 0)\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(20,0)(20, 0)\newline(9,−14)(9, -14)\newline(−11,0)(-11, 0)\newline(15,0)(15, 0)\newlineIs this relation a function?\newlineChoices:\newline(A) yes\newline(B) no
  1. Check xx-values: Check xx-values in the ordered pairs: (20,0)(20, 0), (9,–14)(9, –14), (–11,0)(–11, 0), (15,0)(15, 0).\newlinexx-values: 2020, 99, –11–11, xx00.
  2. Repeat xx-values: Do any xx-values repeat?\newlineNo, all xx-values are unique.
  3. Function determination: Since no xx-values repeat, each xx-value is paired with exactly one yy-value. This means the relation is a function.

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