In order to find the figure reflected over the x-axis, we need to change the signal of the y-coordinate of all points.
The points of the original figure are:
(-6, -6)
(-6, -4)
(-4, -3)
(-4, -6) (big dot)
After the reflection over the x-axis, the y-coordinates are changed, so we have:
(-6, 6)
(-6, 4)
(-4, 3)
(-4, 6) (big dot reflected)
Drawing the image and its reflection, we have: