Question

Which of the following relations is not a function

A.) (5,5), (-6,2), (5,1), (8,6)
B.) (-8,4), (4,3), (-5,1), (7,2)
C.) (9,5), (-6,2), (6,1), (-8,2)
D.) (-4,6), (4,-6), (2,0), (0,1)

Answer 1

A

Explanation:

A function is a rule that assigns exactly one output to each input. This means that no input repeats.

Option A has (5,5) and (5,1) where one input has two different outputs.