Answer: just plug in numbers
Step-by-step explanation:
first row
0, 1, 2, 3, 4, 5
so pairs would be
(-3, 0), (-2, 1), (-1, 2), (0, 3), (1, 4), (2, 5)
second row
-5, -3, -1, 1, 3, 5
pairs:
(-3, -5), (-2, -3), (-1, -1), (0, 1), (1, 3), (2, 5)
third row:
-9, -7, -5, -3, -1, 1
pairs:
(-3, -9), (-2, -7), (-1, -5), (0, -3), (1, -1), (2, 1)
fourth row:
-4, -2, 0, 2, 4, 6
pairs:
(-3, -4), (-2, -2), (-1, 0), (0, 2), (1, 4), (2, 6)
let me know if you need explanations/more help