Brandy went mountain climbing. she ascended 20 feet above sea level and then descended 5 feet. determine the opposite of the height brandy descended. how do you know the value you chose is the opposite?

What am i doing here. add?

Answercounterclockwise rotation about the origin by 180 degrees followed by reflection about the y-axisexplanationthe given figure has verticesrecall that for counterclockwise rotation about the origin, when we rotate figure pqrs counterclockwise through an angle of 180° about the origin, the coordinates will becomenext, we reflect in the y-axis by negating the x-coordinates of the resulting figure to obtain,therefore the correct answer is c