Question 1(Multiple Choice Worth 1 points) (02.05 MC)

Two similar polygons are shown below:

A coordinate grid is shown from positive 6 to negative 6 on the x-axis and from positive 6 to negative 6 on the y-axis. A polygon PQRS is shown with vertex P on ordered pair negative 4, negative 2, vertex Q on ordered pair negative 4, negative 6, vertex R on ordered pair negative 2, negative 4 and vertex S on ordered pair negative 2, negative 2. A polygon P prime Q prime R prime S prime is shown with vertex P prime on ordered pair negative 2, negative 1, vertex Q prime on ordered pair negative 2 , negative 3, vertex R prime on ordered pair negative 1, negative 2 and vertex S prime on ordered pair negative 1, negative 1.

Which transformation was performed on PQRS to form P'Q'R'S'?

A dilation factor of 2
A dilation factor of 4
A dilation factor of 1 over 2
A dilation factor of

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