Chanel says the sequence of transformations that maps trapezoid pqrs onto trapezoid klmn is: rotate it 90 degrees counterclockwise, and then dilate it by a scale factor of . preston says the sequence of transformations that maps trapezoid pqrs onto trapezoid klmn is: reflect it across the x-axis, and then dilate it by a scale factor of . part a start with chanels sequence. how does a 90-degree counterclockwise rotation about the origin change the coordinates of a shape?