Answer
Geometric with a common ratio of $-5$.
Work Step by Step
Check if there is a common ratio by diving two consecutive terms:
$\dfrac{-10}{2}$ $=-5$;
$\dfrac{50}{-10}$ $=-5$ ;
$\dfrac{-250}{50}$ $=-5$.
The ratio is constant so this is geometric.The common ratio is $-5$
