Answer:
Top option / (x ,y) -> (x + 6, y + 6)
Explanation:
So we know that RSTU is the original so it will not be the last option (1/4) as it is not getting smaller
To figure out the answer though, we need to figure out the dilation,
See attached photo!
(sorry for sloppy drawing/etc, it is hard on the laptop haha)