Answer:
Yes, it is arithmetic. The common difference is -0.3
Explanation:
Sequences that are arithmetic have a common difference between terms. To find the common difference, take the the second term, and subtract the first term. Check all other terms to make sure they follow the same pattern using the common difference you calculate.
In this example...
3.8 - 4.1 = -0.3
The common difference is -0.3.
3.8 + (-0.3) = 3.5, which is the third term,
3.5 + (-0.3) = 3.2, which is the fourth term
This sequence is arithmetic with a common difference of -0.3