Determining variability
which set shows greater variability?
compare each set of data. determine which set shows
greater variability.
set a
5, 8, 9, 10, 12, 15, 16, 20
set b
24, 34, 37, 42,56,57,65
which measure provides greater variability for the set
you chose?

you start with circle C with a radius of 4. if you dilate circle c to be congruent with circle E, you use the scale factor k=r2/r1 of 3/4.  when an object is dilated, the dilated object is similar to the pre-image. we now have concentric circles. next we will translate circle C to lie on the same center as circle E. circle C can be translated by moving 7 units to the right, and 8 units up. circle C is now at center (9,4) with a radius of 4.