There are a few different values:
[tex] \left \{ {{y=2, 7, 12, 17 } \atop {x=7, 5, 3, 1}} \right. [/tex]
As a warning, I may have formatted this incorrectly, but I hope this helped anyways. A way of writing it that I'm more familiar with would be:
(2, 7), (7, 5), (12, 3), (17, 1)
