Quadrilateral abcd is transformed according to the rule (x, y) → (y, –x). which is another way to state the transformation?
r0, 90°
r0, 180°
r0, 270°
r0, 360°

Several paint mixtures are made by mixing blue paint and white paint. paint colors blue paint white paint mixture a 5 cups 12 cups mixture b 6 cups 6 cups mixture c 4 cups 12 cups mixture d 5 cups 6 cups which mixture has the highest ratio of blue paint to white paint