Which is a recursive formula for the sequence 99.4, 0, –99.4, –198.8, where f(1) = 99.4?

Each term is 99.4 less than the term before it: 0 − 99.4 = −99.4, and −99.4 − 99.4 = −198.8. So the recursive rule is to subtract 99.4 each time, starting with f(1) = 99.4. Choice B gives this rule.

AI-written and checked against the verified answer.