Which of the following relations are functions?

function

not a function

function

reason? if a relation has 2 of the same number on the x value it is not a function. for example 1,2,3 would be a function but 1,2,3,3 wouldnt.

hello i am doing good for you that it's summer in your country or state ; )

btw in my country we just have sun and rain as (because i live in the caribbean lol)

also, thx a lot for the points : )