The reflection of point H(9,3) to its image H'(-9,3) occurred over the y-axis, involving a reversal of the x-coordinate while keeping the y-coordinate unchanged.
The point H(9,3) was reflected over the y-axis to its image H'(-9,3). Reflection over the y-axis involves swapping the x-coordinates of a point while keeping the y-coordinate unchanged.
In this case, the positive x-coordinate 9 of H becomes its negative counterpart, -9, in the image H', indicating that the reflection occurred over the y-axis. Visually, if you imagine a mirror placed along the y-axis, H would be on one side of the mirror, and its image H' would be on the opposite side, maintaining the same vertical distance from the mirror.
This transformation preserves the y-coordinate while changing the sign of the x-coordinate, consistent with the characteristics of a reflection over the y-axis.
Complete question:
H' is the image of the point H after a reflection. H(9,3)to H'(-9,3) Over which axis was point H reflected? x-axis y-axis