#### Answer

The sequence is geometric.
The common ratio is $r=1.1$.

#### Work Step by Step

A geometric sequence has a common ratio $r$. The common ratio is multiplied to the current term to get the next term of the sequence.
The common ratio is equal to the the quotient of a term and the term before it.
Solve for the ratio of each pair of consecutive terms to obtain:
$\dfrac{1.1}{1.0} = 1.1
\\\dfrac{1.21}{1.1}=1.1
\\\dfrac{1.331}{1.21} =1.1$
The consecutive terms have a common ratio so the sequence is geometric.
The common ratio is $r=1.1$.