Write a rule in function notation to describe transformation that is a reflection across the x-axis.
A. Ry-x(X,Y)
B. Rx-0(X,Y)
C. Rx-y(X,Y)
D. Ry-0(X,Y)
The correct answer is: C. Rx-y(X,Y)
In function notation, R represents reflection, and the subscripts indicate the axis of reflection.
The x-axis is a horizontal axis, so the reflection across it will affect the y-coordinate of the points. Therefore, we use "Rx-y" to describe a reflection across the x-axis.
The function notation is written as Rx-y(X,Y), where X and Y are the variables representing the coordinates of a point. When we apply this function to a point (X, Y), it reflects the point across the x-axis, resulting in the new coordinates (X, -Y).
C. Rx-y(X,Y)
I am not familiar with the notation but what happens is (x , y) --->(x , -y)
so I would choose C.