Note: you have not added the image, so I am assuming the quadrilateral MNOP with coordinates M(-4, 0), N(5, -3), P(2, 6) and O(-5, 7). It will anyhow clear your concept as I would explain the concept of reflection over the x-axis.
Explanation:
Considering the quadrilateral MNPO with assumed vertices
THE RULE OF REFLECTION states that when we tend to reflect a point let say (x, y), across the x-axis, the x-coordinate does not change or transform, but the y-coordinate is changed into its opposite sign i.e. (x,-y).
So, the coordinates of the point in the image after quadrilateral MNPO is reflected over the x-axis will be:
(x, y) (x, -y)
M(-4, 0) M'(-4, 0)
N(5, -3) N'(5, 3)
P(2, 6) P'(2, -6)
O(-5, 7) O'(-5, -7)
Hope, it will help you clear your concept regarding reflection of an object over the x-axis. Using this understanding, you can solve any other question related to this topic.