With this one . i do not understand where to start

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!