Decide whether or not the set of ordered pairs defines a function.
-$\{ ( - 6 , - 9 ) , ( - 6 , - 4 ) , ( 1,4 ) , ( 6 , - 4 ) , ( 8 , - 1 ) \}$

Question

Quizplus · Accepted Answer

A set of ordered pairs defines a function if each input (first component of each ordered pair) maps to exactly one output (second component). Here, the input -6 maps to two different outputs (-9 and -4), so it does not define a function.

Decide Whether or Not the Set of Ordered Pairs Defines {(−6,−9),(−6,−4),(1,4),(6,−4),(8,−1)}\{ ( - 6 , - 9 ) , ( - 6 , - 4 ) , ( 1,4 ) , ( 6 , - 4 ) , ( 8 , - 1 ) \}{(−6,−9),(−6,−4),(1,4),(6,−4),(8,−1)}

Decide Whether or Not the Set of Ordered Pairs Defines $\{ ( - 6 , - 9 ) , ( - 6 , - 4 ) , ( 1,4 ) , ( 6 , - 4 ) , ( 8 , - 1 ) \}$