Provide an example of at leave five ordered pairs that do not model a function.?

The domain will be any 5 integers between 0 and 20. The range will be any 5 integers between -10 and 10.

Can someone please help me with this? Explain how you got the answer and why it does not model a function.

I will redo the work because there is obviously more than one answer. Or if you could give me steps to finding the answer.

Thanks.

Give your own example of at least four ordered pairs that does not model a function. The domain will be any four integers between 0 and +10. The range will be any four integers between -12 and +5