1. yes each x value has a unique y value
2.yes each y value has a unique x value
3.no 2 points have different y values for the same x value of 2
4. no two points have different x values for the same y value of 2
![1 yes each x value has a unique y value 2yes each y value has a unique x value 3no 2 points have different y values for the same x value of 2 4 no two points ha class=](https://us-static.z-dn.net/files/d13/91e11beb471a23afbb719dd4872d6d52.png)