Use the translation
(x, y) → (x + 3, y-2). What
is the preimage of
(-4,-1)?

Answer is 45 degrees

SQRS being a square it means all of its corners are 90 degrees.
If T is the middle point of the the square. Exacted in the center of the square.

In a square the diagonals are always at a 45 degrees therefore the angle formed by SPT is 45