Answer:
Not quadratic function
Explanation:
if you see x: -3,-2,-1 0 1, 2, 3, is not repeated in any number. While the y: 18, 13, 8, 3 , -2, -7, -12 should be repeated side-by-side. In y, 3 is the middle and you see both side dont have the same numbers. So its not quadratic function.
If your confused
Just understand it, ok? because im not good in explaining