Final answer:
The transformation rule that makes triangle RST congruent to triangle R'S'T' after the described translation is D) (x, y) → (x - 6, y + 4).
Step-by-step explanation:
The translation that demonstrates that triangle RST is congruent to triangle R'S'T' after being translated 6 units to the left and 4 units up is represented by the transformation rule D) (x, y) → (x - 6, y + 4).
This rule signifies that for any point on triangle RST, you subtract 6 from the x-coordinate (to move it 6 units to the left) and add 4 to the y-coordinate (to move it 4 units up), resulting in the corresponding point on triangle R'S'T'.