Final answer:
To translate the triangle's vertices, we add 3 to the x-coordinate and subtract 4 from the y-coordinate of each vertex. The new vertices are (5, -8), (7, -12), and (10, -5).
Step-by-step explanation:
To translate the triangle's vertices using the transformation (x+3, y-4), we add 3 to the x-coordinate and subtract 4 from the y-coordinate of each vertex.
Therefore, the new vertices can be found by applying the transformation to the original vertices:
(2, -4) + (3, -4) = (5, -8)
(4, -8) + (3, -4) = (7, -12)
(7, -1) + (3, -4) = (10, -5)
Therefore, the new vertices after the translation are (5, -8), (7, -12), and (10, -5). Thus, the answer is (d) (2, -4), (4, -8), (7, -1).