Answer:
arithmetic
Step-by-step explanation:
To find out if it is a geometric sequence, divide each term by the previous term. If you always get the same quotient, it is a geometric sequence.
(-25)/(-50) = 0.5
0/(-25) = 0
Since two quotients of consecutive terms are different, this is not a geometric sequence.
To test for an arithmetic sequence, subtract each term from the next term.
If all the differences are equal, it is an arithmetic sequence.
-25 - (-50) = 25
0 - (-25) = 25
25 - 0 = 25
The difference is always 25, so this is an arithmetic sequence with constant difference 25.