Question

Which of the sets of ordered pairs represents a function?

A = {(negative 4, 5), (1, negative1), (2, negative2), (2, 3)}

B = {(2, 2), (3, negative2), (9, 3), (9, negative3)}

Only A
Only B
Both A and B
Neither A nor B

Answer 1

@mathstudent55

Answer 2

none

Answer 3

thank you @queenoftherings

Answer 4

wait wait!

Answer 5

its actually only A

Answer 6

In a function, each x-coordinate can only be used once.
If you see the same x-coordinate used more than once, it is not a function.
Look at the x-coordinates of the first set: -4, 1, 2, 2
Look at the x-coordinates of the second set: 2, 3, 9, 9
In each set, do you see a number being used more than once?
If so, it is not a function.

Answer 7

Answer is NOT A.

Answer 8

so b is not a function?

Answer 9

lol sorry im graphing wrong

Answer 10

wait

Answer 11

you were correct the first time! good job @queenoftherings

Answer 12

:)

Answer 13

Neither one is a function since in the first set, there are two points with x-coordinate 2, and in the second set, there are 2 points with x-coordinate 9.