Question

Can somebody please teach me how to do this?

Answer 1

I don't know how you want me to explain it but I know that answer is 5

:D

Answer 2

Here is how to do the transformations:

I-J and J-K and K-I mark the points

do the same with: I'-J' and J'-K' and K'-I'

K is (1,1) while the other is K' (5,5) to go from 5-1 is dilution of 5