Which algebraic representation of a transformation on a coordinate grid does NOT preserve congruence? A. ( x, y) -> ( x + 6, y + 6)
B. (x, y) -> (-x, y)
C. (x, y) -> (6x, 6y)
D. (x, y) -> (-y, x)

4. jake needs to score in the top 10% in order to earn a physical fitness certificate. the class mean is 78 and the standard deviation is 5.5. what raw score does he need? z value for top 10% =1.282 how do i get the z value? what is the equation for this? raw score =mean+z*sd = 78+1.282*5.5 = 85.051