11 18 Sketch the region enclosed by the given curves Decide whether to integrate with respect to x or y Draw a typical approximating rectangle and label its height and width Then find the area of the region 11 y x 2 y x 1 x 0 x 1 12 y 1 x y 2 x x 1 x 0 13 y 1 x y 1 x x 2 14 y cos x y e x 2 15 y x 2 y x 16 y x 4x y 2x 17 x 1 y x y 1