Question

Mark each of the following graphs as (a) a function, but not one-to-one, (b) one-to-one function, or (c) not a function. In each case, explain how you know.

http://img854.imageshack.us/img854/4431/qegd.png

http://img405.imageshack.us/img405/188/38pl.png

Answer 1

The link you have given is not allowed to open.

Answer 2

If you can draw a horizontal line which intersects with the function twice, then it is not one to one.

Answer 3

The remaining functions are one to one.

Answer 4

Medal?