Question

Which relation is a function?
(Points : 3)
{(2, 4), (2, 7), (2, 11), (2, 15)}

{(1, 3), (5, 3), (6, 7), (5, 0)}

{(0, 7), (4, 8), (0, 9), (6, 10)}

{(6, 0), (7, 14), (2, 5), (2, 5)}

Answer 1

the second one

Answer 2

because there can not be more than one x value in a function

Answer 3

thank you

Answer 4

no problem