Will give
the coordinates of the vertices of trapezoid abcd are a(−1,4), b(0,2), c(1,2) and d(2,4). abcd is first rotated 90° counterclockwise, and then translated 3 units right.
match each coordinate of the final image a′′b′′c′′d′′ in the right column with its correct vertex in the left column.
pair the coordinates with the letters
(1,1)
(−1,−1)
(1,0)
(−1,2)
a"
b"
c"
d"

Each of the following data sets has a mean of x = 10. (i) 8 9 10 11 12 (ii) 7 9 10 11 13 (iii) 7 8 10 12 13 (a) without doing any computations, order the data sets according to increasing value of standard deviations. (i), (iii), (ii) (ii), (i), (iii) (iii), (i), (ii) (iii), (ii), (i) (i), (ii), (iii) (ii), (iii), (i) (b) why do you expect the difference in standard deviations between data sets (i) and (ii) to be greater than the difference in standard deviations between data sets (ii) and (iii)? hint: consider how much the data in the respective sets differ from the mean. the data change between data sets (i) and (ii) increased the squared difference îł(x - x)2 by more than data sets (ii) and (iii). the data change between data sets (ii) and (iii) increased the squared difference îł(x - x)2 by more than data sets (i) and (ii). the data change between data sets (i) and (ii) decreased the squared difference îł(x - x)2 by more than data sets (ii) and (iii). none of the above