List the first ten terms of a sequence whose first term is - 10 and whose common difference is - 2.

Let a (0) represent the first term; its value is - 10. The next term is found by subtracting 2 from - 10, obtaining - 12. Each new term is created by subtracting 2 from the previous one. Thus, the formula for the nth term is

a (n) = a (0) - 2 (n-1), or a (n) = - 10-2 (n-1).

First term: - 10

Second: - 12

Third: - 14,

...

Tenth term: a (10) = - 10-2 (10-1) = - 10 - 18 = - 28