ACTIVITY 1: ***Tell Me!" Direction: Determine whether the sequence appears to be an arithmetic sequence Write AS if the sequence is arithmetic sequence and NAS if the sequence is not an arithmetic sequence 1. 9,13,17,21,... 2. 10,8,5, 1,... 3. -4,-2,1,5,... 4. 4,1, -2,-5,... 5. 11,5,-1,-7,... ​