A rectangle has vertices (–1, 1), (–4, 1), (–1, 3), and (–4, 3). If the rectangle is rotated 90° clockwise, what algebraic rule can be used to find each of the new vertices? (x, y) → (–y, x)

(x, y) → (–y, –x)

(x, y) → (x, –y)

(x, y) → (y, –x)

He weights of 2-pound bags of best dog food are approximately normally distributed with a given mean  and standard deviation  according to the empirical rule, what percentage of the bags will have weights within 3 standard deviations of the mean? 47.5%68%95%99.7%