Answer
The sequence is arithmetic.
Common difference $d=-3.45$.
Work Step by Step
We compute the difference between each term and the preceding term. If the difference is same, then the sequence is arithmetic.
$a_{2}-a_{1}=10.55-14=-3.45$
$a_{3}-a_{2}=7.1-10.55=-3.45$
$a_{4}-a_{3}=3.65-7.1=-3.45$
$a_{5}-a_{4}=0.2-3.65=-3.45$
$a_{6}-a_{5}=-3.25-0.2=-3.45$
The difference between each term and preceding term is constant and therefore the sequence is arithmetic.
Common difference $d=-3.45$
