What is the common difference of the arithmetic sequence?

7,2, - 3, - 8. - 13 ...

A)

-20

B)

--5

5

D)

20

Answer: - 5

Explanation: The common difference is the difference between each of the terms in the sequence. Notice that to get from 7 to 2, we must subtract 5. In the same way, to get from 2 to - 3, we must subtract 5.

So - 5 is your common difference.