Question

Which of the following sets represents a function?

{(3, 5), (-1, 7), (3, 9)}
{(1, 2), (3, 2), (5, 7)}
{(1, 2), (1, 4), (1, 6)}

Answer 1

Why x does not repeat?

Answer 2

Which*

Answer 3

(x,y) if the x is repeating it is not a function. (same number)

Answer 4

its one of the 3 choices i gave but i dont know.

Answer 5

Its the second one because the x is 1 3 5
while the other two the x is repeating. the first one 3 -1 3
the third one is 1 1 1

Answer 6

Does my explanation help?