-6 and 0
The distance is 6. (we use the absolute value) I hope the number line helped.
-1 and -19
I want you to consider this formula:
|a-b|=|b-a|
a will be -1 and b will be -19 so like....
|-1-19| = |20|
|-19-1| = |20|
It doesn't matter what point you start with either way it will give you the same answer.