Answer:
Given the length of AB = 5 units, scale factor(c) = 
When we dilate a line segment, the original line segment will always be parallel to the image.
Also, if the length of the original line segment is L and the scale factor is c, the length of the image will be after dilation is, cL
length of image(A'B') = 
A'B = 
Therefore, the length of the image of AB is,
units.