Answer:
See explanation
Explanation:
Arithmetic = increase by a constant represented by k + x
Geometric = increase by an exponential amount represented by k^x or k + a^x
-1, 3, 7, 11, 15 = arithmetic
-4, -2, 1, 4, 8 = neither
36, 12, 4, 4/3, 4/9 = arithmetic 1/2