Question

I just want to make sure that a circle graph is a function? I think it is.

Answer 1

strictly speaking the graph of a circle is not a function, because it has 2 y values for a particular x

Answer 2

Ohhh....it's not? :(

Answer 3

well you need to split the circle into 2 parts if its to become a function. This is because it fails the vertical line test

Answer 4

Oh, I get what you mean. :) Thanks soo much! :)