Question

For these two I have to determine whether it represents a function or not.

Answer 1

*For the first one we can see that it does not represent a function, the reason being that in the point x = 0, it proyects two images: (0, 5) & (0, -3).

*For the second one, we can see that it does represent a function, each value in from the domain only proyects an image on the range.