Question

I was hoping could anyone help me solve these pre-cal questions. Question are in the attachment.

Answer 1

- If you can draw a vertical line that touches the graph more than once, it's not a function.
- If you can draw a horizontal line that touches the graph more than once, it's not a one-to-one function.

Answer 2

What about the other questions?

Answer 3

I only saw two graphs in the link with the question of whether they were function and/or 1-to-1.