Answer:
A - 3 square units
Explanation:
This is a type of geometry problem so we need to use principles of translations. They say to translate M and N one unit to the left so T<-1,0>. We translate M(2,5) to M'(1,5) and N(5,1) to N'(4,1) because we subtract one from the x coordinate.
Now, you can use a drawing to find the area or you can simply find the difference in x and y values.
Let's use a drawing:
Since we know the horizontal and vertical distance, we do 3 x 1 = 3 square units.