Answer:
6 units.
Step-by-step explanation:
A translation is called a rigid transformation or isometry. It is a transformation that preserves congruence.
This means that all of the image sides will be congruent to the pre-image sides.
Based on the statement we are given, we know that AB and OL correspond. This means that the length of AB in the pre-image will be the same as the length of OL in the image, or 6 units.