Question

What is the next two answers in the sequence ? 1.5 3.9 6.3 8.7.. ?

Answer 1

The rate of change is 2.4, so the next two answers could be found by adding 2.4 to each.

8.7+2.4=11.1
11.1+2.4=13.5

Therefore, the next two numbers would be 11.1 and 13.5.