Answer:type = arithmetic sequence, next term = 7 and d or r = 2Step-by-step explanation:1. Determine the type of sequence-1 - (-3) = 21 - (-1) = 23 - 1 = 25 - 3 = 2Since the difference between the consecutive terms are constant, this is an arithmetic sequence2. Find the differenced = 23. Find the next term5 + 2 = 7