Are you looking for a rule to describe the sequence or just the shape of the data?
The following set of data were taken in an poll. What is the pattern of the numbers?
Set A : 42, 35, 28, 24, 21, 18, 15
Set B: 6.0, 7.2, 9.0, 10.5, 12.0, 14.0, 16.8
(Unfortunately, people often edit or delete questions if they suddenly start worrying about asking for help when they weren't meant to. Such people would be well advised to read rule #7 here: http://www.mathhelpforum.com/math-he...carefully.html). My signature also contains the link.