The distance between two points on a number line is required.
The distance between [tex]-20[/tex] and [tex]-6[/tex] is 14 units.
Let two numbers on the number line be [tex]a[/tex] and [tex]b[/tex].
The distance between them will be the absolute value [tex](|\ |)[/tex] of the difference of the two numbers.
So, distance between two numbers is
[tex]|a-b|[/tex] or [tex]|b-a|[/tex]
The given numbers are [tex]-20[/tex] and [tex]-6[/tex]
Distance between them is
[tex]|-20-(-6)|=|-14|=14\ \text{units}[/tex]
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