Final answer:
The possible point for D is (5,-4).
Step-by-step explanation:
To find the possible points for D, we need to consider that the segment BC is a horizontal line segment with the same y-coordinate of -4. Since the area of the triangle BCD is given as 15 square units, we know that the height of the triangle, which is the y-coordinate of D, must be 15 units. Therefore, D can be at the point (5, -4).
Learn more about Triangle Area