Which of the following sets of ordered pairs is a function?

A

{ (1,5), (2,6), (4,5) }

B

{ (5,5), (6,5), (5,6) }

C

{ (2,3), (-4,5), (2,6) }

D

{ (2,3), (2,6), (-2,8) }

A

(1,5), (2,6), (4,5)

Step-by-step explanation:

Think of the answer choice in a table

x | y

1 | 5

2 | 6

4 | 5

exactly one input (x) has one output (y)

in a function likw this you have to make sure that the x is going to one y.

if not than it is not a function.

(1,2), (1,5) (3,9)

see the one in this orderd pair goes to 2 and 5 so in is not a function