Answer:
You add by +4.
Step-by-step explanation:
-5 + 4 = -1
-1 + 4 = 3
3 + 4 = 7
7 + 4 = 11
11 + 4 = 15
and then you just add on with +4.
If you are still confused, make sure to use a number line.
Anser the answer the anser is 4
Square root of 121 or about 11 if it wants you to round