Mathematics for IGCSE & O level - Sequences (Section 2 - No. 21)
Which of the following sequences is a linear sequence?
3, 5, 7, 8,...
75, 72, 68,...
4, 9, 16, 25,...
2, 8, 16, 21,...
Explication
A linear sequence has a constant difference between consecutive terms. The sequence in option B has a constant difference of -3.