Which of the sets of ordered pairs below represents a function? {(1,2), (2,3), (-2,4), (1,5)} {(5,2), (4,3), (-2,4), (1,5)} {(5,2), (2,3), (-2,4), (2,5)} none of the above
notice, the set is just an x,y pair the set without an X-REPEAT is a function
lets's see the first set for example [tex]\bf \{(\boxed{1},2), (2,3), (-2,4), (\boxed{1},5)\} \impliedby \textit{ooops, one }\boxed{repea t}}}[/tex] thus is not a function
