x + 4 → 4 u ni t s t o t h e l e f t y − 1 → 1 u ni t d o w n
The translation rule ( x , y ) → ( x + 4 , y − 1 ) describes a movement of 4 units to the right and 1 unit down. Therefore, the correct answer is A. 4 units to the right and 1 unit down.
;