Question

Determine if the relation is a function.

Answer 1

please tell me how to find this ill give you a medal!

Answer 2

Just do the vertical line test. If a vertical line touches more than 1 point, it is not a function.

Answer 3

^ this is true in specific cases, but must be careful to define 'what' is a function of 'what.'

Answer 4

For that picture, if you say that the vertical is 'y' and the horizontal is 'x' then y is not a function of x, but x *is* a function of y.
So, technically, it is a function, but it is not a function of x.