# Sequence pattern 1 - Consistent difference

The easiest pattern in a sequence to find is when there is a consistent difference between the terms, either addition or subtraction.

They also call this a linear sequence.

This is one of the most famous linear sequences

Linear as in draw one line between each

and in this case, we get a difference of 2.

**Example 1**

Find the differences between each number below:

`7`, `11`, `15` and `19`

First, see if there is a consistent difference between each number.

Answer = 4

**Example 2**

Find the difference between each number below:

`0`, `-3`, `-6`, `-9`, `-12`

First, see if there is a consistent difference between each term.

Answer = `-3`

**Example 3**

Find the difference between

`2`, `9`, `16`, `23`, `30`

First, see if there is a consistent difference between each term.

Answer = `7`

**Example 4**

Find the differences between each number below:

`0`, `-4`, `-8`, `-12`, `-16`

First, see if there is a consistent difference

Answer is `-4`

**Example 5**

Find the difference between each number below:

`-1/2`, `-1/4`, `0`, `1/4`, `1/2`

First, see if there is a consistent difference.

Answer is `1/4`

**Example 6**

Find the difference between each number below:

`-1.1`, `-1.5`, `-1.9`, `-2.3`, `-2.7`

First, see if there is a consistent difference

Answer = `-0.4`