Which formula can be used to describe the sequence? 1 point 2 comma 3 comma 7 point 5 comma 18 point 7 5 comma dot dot dot

Each term is 2.5 times the previous term: 3 ÷ 1.2 = 2.5, and 7.5 ÷ 3 = 2.5. A geometric sequence with first term 1.2 and common ratio 2.5 is described by f(x) = 1.2 × 2.5^(x − 1), which is choice B.

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