The correct response to describe the effect on the coordinates of the vertices of a figure that is translated down 4 units and to the right 3 units is:
Add 3 units to each x-value and subtract 4 units from each y-value.
In a translation, moving to the right increases the x-coordinate, and moving down decreases the y-coordinate. Hence, for each vertex point (x, y), after the transformation, it will become (x + 3, y - 4).