Andrea has to find a third point, C , to form a triangle on the coordinate plane shown. She is told the coordinates of its reflection point, C′ , across the x -axis are (2,−2) . What are the coordinates of point C ?
To find the coordinates of point C, we need to find the reflection point across the x-axis.
The reflection point across the x-axis can be found by changing the sign of the y-coordinate of the given point C′.
So, if the coordinates of C′ are (2, −2), the coordinates of C will be (2, 2) because the sign of the y-coordinate is changed.
Therefore, the coordinates of point C are (2, 2).