Question

Select Is a Function or is not a Function to correctly classify each relation.

Title
Is a Function
is not a Function
{(3, 2), (6,4),(9,6), (12,8)}
{(2,3), (2,5),(3,6), (9,4)}
{(2, 4), (6,3), (4,8),(6,6)}
{(3, 4), (5,2), (6,8),(6,4)}​

Answer 1

#1 is a function

#2,3,4 is not a function

Explanation:

The two of the same x values of 2, 3 & 4 have different y values.