Answer:
The answer is C. (x,y) ---> (x-4,y-7)
Explanation:
The points for DEF are:
D = (-1,5)
E = (3,3)
F = (-1,3)
If you go through these points and subtract 4 from the x values and 7 from the y values you'll get:
D' = (-5,-2)
E = (-1,-4)
F = (-5,-4)
Which match the values of D'E'F'.
Hope this helps :)