Which best describes the relationship between the successive terms in the sequence below?–3.2, 4.8, –7.2, 10.8, …

Divide each term by the one before it: 4.8 ÷ (−3.2) = −1.5, and −7.2 ÷ 4.8 = −1.5. The same ratio also takes −7.2 to 10.8, so the sequence has a common ratio of −1.5. Choice C is correct.

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