Given that there is a line segment ABwith end points at A(0.-7) and B(8,8)
this is transformed into A'B' with end points (6,-6) and (2,1.5)
To find the scla efactor of dilation.
It is enough to find the ratio of A'B' to AB.
AB = distance between A and B =

Let us find new length A'B'
A'B' = distance between A' and B' =

i.e. 17 distance is shrunk into 8.5 distance.
Hence scale factor= 8.5/17 = 1/2
there is a dilation of 1/2 .
Scale factor = 1/2