Continue the pattern for three more terms. Describe how to find the successive terms.

a)12,9,6,3
b)5,6,8,11
c)3,-1,-6,-12

Please help

3 answers

a) 3 us subtracted from each preceding number.
0, -3, -6

b) 1, 2, 3 . . .

c) Do you see the pattern here?
I don't know how to explain c. I know the next 3 terms is -19,-27,-36
3 - 4 = -1