Question

Is this relation a function
(x,y)
(6,3)
(-1,2)
(-1,-1)
(4,3)

I think its not

Answer 1

No

Answer 2

It's not, you're correct!

Answer 3

Do you know the definition of a function?

Answer 4

Same concept we just exchanged on the other thread.

Answer 5

you can use...what my teacher calls the vertical line test for questions like this for every vertical line, there should only be one point
otherwise it's not a function.
basically, for every x, there must be only one y. Two ys can have the same value, but two different ys cannot be with one x

Answer 6

Something fails to be a function when a single INPUT goes to more than one OUTPUT.

So in this case, the "INPUT" is "the value of x" and the OUTPUT is "the value of y".

Notice how you have (-1,2) and (-1, -1) .

This breaks the rule for "being a function". The "INPUT" of (-1) goes to TWO outputs... (2) and (-1).

So this is what we, in the business, call a "function fail". :-p

Answer 7

no way man..