square abcd was translated using the rule (x, y) → (x – 4, y + 15) to form a'b'c'd'. what are the coordinates of point d in the pre-image if the coordinates of point d’ in the image are (9, –8)?
a. (13, –23)
b. (5, 7)
c. (18, 1)
d. (–6, –4)