Why are the triangles congruent? A clockwise rotation of 90° and a reflection across
the x-axis maps ZR to ZR', ZS to ZS' and ZT to
ZT.
3
2
1 R
A translation up 2 and to the right 2 maps RS to
R'S'. ZS to ZS', and ST to S'T'.
-2 -1
S
3 4X
1
2
- 1
pi
T
2
A reflection across the x-axis maps ZR to ZR', ZS
to ZS', and ZT to ZT'.
-3
-4
A counterclockwise rotation of 180° maps RS to
R'S, ZS to ZS and ST to S'T'.

In this problem, we explore the effect on the standard deviation of multiplying each data value in a data set by the same constant. consider the data set 14, 6, 8, 15, 15. (a) use the defining formula, the computation formula, or a calculator to compute s. (round your answer to one decimal place.) s = 4.28 (b) multiply each data value by 3 to obtain the new data set 42, 18, 24, 45, 45. compute s. (round your answer to one decimal place.) s = 12.83 (c) compare the results of parts (a) and (b). in general, how does the standard deviation change if each data value is multiplied by a constant c? multiplying each data value by the same constant c results in the standard deviation remaining the same. multiplying each data value by the same constant c results in the standard deviation being |c| times as large. multiplying each data value by the same constant c results in the standard deviation increasing by c units. multiplying each data value by the same constant c results in the standard deviation being |c| times smaller. (d) you recorded the weekly distances you bicycled in miles and computed the standard deviation to be s = 3.8 miles. your friend wants to know the standard deviation in kilometers. do you need to redo all the calculations? yes no given 1 mile ≠1.6 kilometers, what is the standard deviation in kilometers? (enter your answer to two decimal places.)