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Dilation involves changing the size of a line segment
The scale factor is 2
From the question (see attachment), we have the following side lengths



So, the scale factor (k) from AB to A'B' is calculated using the following scale factor formula

This gives

Divide 2.5 by 1.25

Hence, the scale factor is 2
Read more about dilations at:
brainly.com/question/3457976
A person who in debt and needs to pay the debt off as soon as possible.