Which table does NOT represent a linear function?

Answer:
3rd
Step-by-step explanation:
3rd one because rate of change is not same
18 - 15 / 0 - -1 = 3
20 - 18 / 1 = 2
21 - 20 / 1 = 1
Answer: i honestly think it would be the table with:
-1,15
0,18
1,20
2,21
Step-by-step explanation: hope this helped ty for the points