Using this GeoGebra applet, you will practice finding the reflection of point A across a given line.
You will do this by moving point B to the location that would be the same location of point A' across the given line.
Once you believe you have the correction location, click in the box "Check your answer". If you are correct, then select New Line to continue. If your answer is not correct, then uncheck the box and try again.

Record the coordinate points of both points A and B as well as the equation of the reflected line. What patterns to observe as you work through this activity?