# Which sequence of y-values was formed from the function y = -2x - 9 using whole numbers for x?

We will substitute whole numbers for x.

## Answer: This forms an arithmetic sequence with a common difference of 4.

Let's find the sequence of y-values.

**Explanation:**

For x = 0, y = -2(0) -9 = -9

For x = 1, y = -2(1) -9 = -11

For x = 2, y = -2(2) -9 = -13

For x = 3, y = -2(3) -9 = -15

If you carefully observe, y-values are just 2 less than their previous values.