Answer:
Each of these sequences goes into the classification box above it.
Explanation:
If the difference of terms is a constant, it is arithmetic.
... (3 -(-1)) = 4 = (7 -3), so the first sequence is arithmetic
If the ratio of terms is a constant, it is geometric.
... 12/36 = 1/3 = 4/12, so the second sequence is geometric
The third sequence has neither constant differences nor constant ratios, so is neither arithmetic nor geometric.