Determine if the sequence is arithmetic. if it is, find the common difference. 1) -1,-2,-6,-24 2) -20,-10,0,10 3) 30,38,46,54 4) 37,33,29,25

1) -1,-2,-6,-24 . . . is not an arithmetic sequence.

2) -20,-10,0,10 . . . is an arithmetic sequence with common difference of 10.

3) 30,38,46,54 . . . is an arithmetic sequence with common difference of 8.

4) 37,33,29,25 . . . is an arithmetic sequence with common difference of -4