Answer: 3.5
Step-by-step explanation:
For this question, we are simply finding a pattern.
7.9-6.8=1.1
6.8-5.7=1.1
5.7-4.6=1.1
So we can see from above that the different between each adjacent numbers are 1.1.
Thus, the next number will be 4.6-1.1=3.5
