Question

Select the correct answer.
Which relation does not represent a function?
A.
{(3, 0), (0, 3)}
B.
{(6, -2), (5, -2)}
C.
{(3, 4), (3, 5)}
D.
{(5, 5), (-5, -5)}
E.
{(1, -2), (-2, 1)}

Answer 1

C

Reason: A function cannot assign two different outputs to the same input. Option C contains (3,4) and (3,5), so input 3 maps to two values.