Question

In the arithmetic sequence {−9,−4,1,6,11,…}, what is the common difference?

Enter your answer as a number, like this: 42

Answer 1

The common difference is 5.

Explanation:

I chose two numbers (6 and 11) and saw what plus 6 is 11. So i did 11-6 and got 5. Then I checked my work by doing -9+5 and it was -4.