Functions — Test

Question 15 • CMS 2026-2027 NC Math 1 CREDIT RECOVERY

Which set of ordered pairs represents a function?

Answer

start set 6 comma 8 comma 5 comma 2 comma negative 2 comma negative 5 comma1 comma negative 3 comma negative 2 comma 9 end set

start set negative 3 comma 1 comma 6 comma 3 comma negative 3 comma 2 comma negative 3 comma negative 3 comma 1 comma negative 1 end set

start set 3 comma negative 1 comma 7 comma 1 comma negative 6 comma negative 1 comma 9 comma 1 comma 2 comma negative 1 end set

start set open paren 2 comma negative 2 close paren comma open paren 1 comma 5 close paren comma open paren negative 2 comma 2 close paren comma open paren 1 comma negative 3 close paren comma open paren 8 comma negative 1 close paren end set

Explanation

A set of ordered pairs represents a function when each input (the first number in each pair) is matched with exactly one output. In choice C, the inputs are 3, 7, −6, 9, and 2; none repeats, so each has just one output. The other choices repeat an input with different outputs, so they are not functions.

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