Question

What is the common difference, d, of the sequence?

9, -8, - 25, -42, - 59,

enter your answer in the box
d= __

Answer 1

Explanation:

We'll start by looking at the difference between 9 and -8.

To get from 9 to -8, we can see that we need to subtract 17.

Now, let's see if we can subtract 17 each time to get the next terms.

To get from -8 to -25, we can see that we must subtract 17 again.

Looks like the difference is -17, but let's check once more to see if we are correct.

To get from -25 to -42, we must subtract 17 again.

Therefore, d = -17

Hope this helped!