Answer:
C to D = (9, -5)
D to C = (-9, 5)
Explanation:
The shape has moved but retained the same size, so it has been translated.
To find the vector (how much it has been moved by), pick a point on the shape and count how many squares to the equivalent on the other shape.
From C to D is 9 to the right and 5 down, therefore it has moves positively in the x axis and negatively in the y axis.
Vectors are written as

Therefore this vector is

From D to C is the same in the inverse, so D to C is
