Which set of order pairs in the form of (x,y) does NOT represent a function of x?

1. {(-1,2),(3-2),(0,1),(5,2)}
2. {(-1,2),(3,2),(-2,2),(0,2)}
3. {(-1,2),(3,-2),(0,1),(3,5)}
4. {(-1,2),(2,3),(3,-2),(-2,0)}

Question

Which set of order pairs in the form of (x,y) does NOT represent a function of x?

1. {(-1,2),(3-2),(0,1),(5,2)}
2. {(-1,2),(3,2),(-2,2),(0,2)}
3. {(-1,2),(3,-2),(0,1),(3,5)}
4. {(-1,2),(2,3),(3,-2),(-2,0)}

ganeshie8 · Answer

go thru each option,
which option has repeated x-value ?

anonymous · Answer

each one repeats -1 and three of them repeat 3.

ganeshie8 · Answer

look at first option :-
1. {(-1,2),(3-2),(0,1),(5,2)}
       ^        ^      ^       ^

ganeshie8 · Answer

is there any repitition in x-values ?

anonymous · Answer

no?

ganeshie8 · Answer

good, so its a function.

ganeshie8 · Answer

look at 2nd option
2. {(-1,2),(3,2),(-2,2),(0,2)}
      ^        ^        ^      ^

ganeshie8 · Answer

is there any repitition in x-values ?

anonymous · Answer

Nope

ganeshie8 · Answer

Very good, its a function also.

ganeshie8 · Answer

wat about 3rd option ?

anonymous · Answer

Nope, so that means it'd be the last one? but how?

ganeshie8 · Answer

Careful, look closely at 3rd option

ganeshie8 · Answer

3. {(-1,2),(3,-2),(0,1),(3,5)}
       ^       ^       ^       ^

anonymous · Answer

Oh! haha I completely missed that. that would be the answer because of the 2 3s

ganeshie8 · Answer

Yup !!

anonymous · Answer

Thank you! I would have missed that again if you didnt point it ot lol

ganeshie8 · Answer

happens lol when u go 100 meter dash at doing hw :))

anonymous · Answer

Haha yeah.