Answer:
6 units
Explanation:
(8, 10 ) → (8, 4 )
since the x- coordinates of each point are the same, both 8
then this is a vertical straight line
the difference is then the absolute value of the difference in the y- coordinates, that is
| 10 - 4 | = | 6 | = 6
or
| 4 - 10 | = | - 6 | = | 6 | = 6