## Algebra 1: Common Core (15th Edition)

$r=\frac{50}{200}=\frac{1}{4}$ $r=\frac{12.5}{50}=\frac{1}{4}$ $r=\frac{3.125}{12.5}=\frac{1}{4}$ There is a common ratio, $r = \frac{1}{4}$. So, the sequence is geometric.