Answer:
x = -4, y = 6.
x = 0, y = 7.
x = 4, y = 8.
x = 8, y = 9.
Explanation:
We are given the following rule:

To solve this question, we replace x by the asked values.
When x = -4

So x = -4, y = 6.
When x = 0

So x = 0, y = 7.
When x = 4

So x = 4, y = 8.
When x = 8

So x = 8, y = 9.