Exercise 15 Page 204

By observing the change that occurs between consecutive terms, we can describe the pattern of the arithmetic sequence. Here, we see that to get from a term to the next term we $\text{subtract}$ $0.3.$ Therefore, the common difference of the sequence is $\text{-}0.3.$ To find the next three terms in the sequence, we will extend this pattern three times. Therefore, the next three terms are $0.1,$ $\text{-}0.2,$ and $\text{-}0.5.$