The distance formula between two points on a number line can be used to find the distance between points.

The distance AB = (1)

Or

The distance AB = (2)

From figure; the coordinates of *A* and *B* are 2 and 10 respectively.

First try the formula (1):

Substitute the coordinate values in the distance formula.

The distance AB =

(Subtract )

The distance is a positive unit and can not be negative, so the absolute value considered. The distance AB = 8 units.

Next, try the formula (2):

Substitute the coordinate values in the distance formula.

The distance AB =

(Subtract )

(Absolute value of 8 is 8)

The distance AB = 8 units.

The measure AB is 8 units.

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