Question

Which best describes the relationship between the successive terms in the sequence below?

–3.2, 4.8, –7.2, 10.8, …

Answer 1

next time please post the answer choices

The terms have a common difference of 8.
The terms have a common difference of 1.6.
The terms have a common ratio of –1.5.
The terms have a common ratio of –0.67.

Answer 2

the terms switch back and forth between positive and negative signs, which is a clue that it's a common ratio, not a common difference (simply adding or subtracting the same value over and over again would *not* result in alternating signs)

to find the common ratio, simply take any term from the sequence and divide it by the previous term