Andrea has to find a third point C, to form a triangle on the coordinate plane. She is told the coordinates of its reflection C', across the x-axis are (-2,2). What are the coordinate points of C?
Since C' is the reflection of C across the x-axis, the y-coordinate of C' will be the negative of the y-coordinate of C.
Therefore, the y-coordinate of C will be -2.
We know that C' has coordinates (-2,2), so the x-coordinate of C will remain the same, which is -2.
Therefore, the coordinates of C are (-2, -2).