△rst is mapped to △r′s′t′ using the rule (x, y)→(x, −y) followed by (x, y)→(3x, 3y) . which statement correctly describes the relationship between △rst and △r′s′t′ ? △rst is not congruent to △r′s′t′ because the rules do not represent a sequence of rigid motions. △rst is congruent to △r′s′t′ because the rules represent a reflection followed by a rotation, which is a sequence of rigid motions. △rst is congruent to △r′s′t′ because the rules represent a reflection followed by a translation, which is a sequence of rigid motions. △rst is congruent to △r′s′t′ because the rules represent a rotation followed by a translation, which is a sequence of rigid motions.