If you look at the positions of the root notes (key notes) in the previous scale pattern, you will notice that they form a triangular pattern.
In the following basic E chord and E form bar chord (root 6), you can see that the root notes are in the same positions as they are in the scale pattern. This is why the scale pattern can be described as the E form of the scale, or pattern 1.
E
E Form
Here are some licks which use the minor pentatonic scale in different keys. The first one uses the C minor pentatonic scale as previously shown.
This one uses the E minor pentatonic in the 12th position.