Station F Answers

1.  It is arithmetic because there is a common difference of 1.

2.  It is geometric because there is a common ratio of -2.

3.  It is neither because it does not have a common difference or a common ratio.

4.  It is geometric because there is a common ratio of 3.

5.  It is neither because it does not have a common difference or a common ratio.

6.  It is arithmetic because there is a common difference of -4.

7.  common diff. = 5; 29, 34, 39

8.  common diff = -2; -13, -15, -17

9.  common diff = -10; -28, -38, -48

10.  common ratio = 10; 20,000, 200,000, 2,000,000

11.  common ratio = 1/2; 5, 5/2, 5/4

12.  common ratio = 1/3; 1/162, 1/486, 1/1458