It looks like the first 1 is the first problem, problem #1. (because of the period)
If this is the case, then the second sequence is 1, 0, -1, ...
1-1=0
0-1=-1
-1-1=-2
-2-1=-3
-3-1=-4
The sequence would then be 1, 0, -1, -2, -3, -4, ...
-11 because you are going down 11 and down would be negative.
Answer:
4th option
Step-by-step explanation:
Each interval is 2 units. Because in between the two points there are 21 intervals, the range is 42 (21*2).