Question

Which relation is a function?

A.
x −14 −9 −1 4 6
y 6 2 −3 2 4


B.
x −2 1 9 9 15
y −3 −3 0 −8 12


C.
x −4 6 6 7 9
y −1 −3 −1 15 1


D.
x −16 −11 10 10 16
y 2 0 1 −9 2

Would Someone Mind Telling Me How I Figure Out If Its A Function Or Not?

Answer 1

if the x-values repeat then relation is not a function
if there is no duplicate of x value then relation is a function

Answer 2

okay :) A would be my answer!

Answer 3

correct http://prnt.sc/b140jn

Answer 4

lol , thanks