Identify the arithmetic sequence from the following choices. Find its common difference and the next three terms.
–9, –18, –27, –36, ...
d = –9
next three terms are –45, –54, –63
11, 22, 44, 88, ...
d = 11
next three terms are 99, 110, 121
2, 4, 6, 9, ...
d = 2
next three terms are 12, 15, 18
5, 8, 12, 17, ...
d = 3
next three terms are 23, 30, 38
