Final answer:
The new point for (-10, 15) after reflection over the x-axis is (-10, -15).
Step-by-step explanation:
When a point is reflected over the x-axis, the x-coordinate remains the same while the y-coordinate is multiplied by -1. Therefore, the new point for (-10, 15) after reflection over the x-axis would be (-10, -15). This is because the reflection over the x-axis inverts the sign of the y-coordinate, mirroring the point across the axis.