Hello!
To solve this you look at one point of the smaller rectangle
A point of the smaller rectangle is (3, 1)
Now we look at the corresponding point of the larger rectangle
The corresponding point is (6, 2)
Now we look at what happened between the points
They doubled both x and y
This can be written as (2x , 2y)
The answer is D) (2x , 2y)
Hope this helps!