Use the table. Which inference can you make by comparing the measures of center?

A: every runner ran faster last year as compared to this year

B: most runners ran faster last year, on average, as compared to this year

C: the runners ran faster this year, on average, as compared to last year

D: every runner ran faster this year as compared to last year

C: the runners ran faster this year, on average, as compared to last year

Step-by-step explanation:

Mean is a measure of center and MAD is a measure of dispersion. Comparing the means, this year, on average, the runners ran faster than last year.

given that triangle abc is transformed two times to get triangle

a"b"c"

first abc is transformed in to a'b'c' as follows:

the coordinates of a are (1,-1) and transformed into a'(-1,1)

similarly b (4,-2) became b'(-4,2) and

c(7,-2) became c'(-7,2)

i.e. (x,y) becomes (-x,-y)

this is nothing but reflection about a point here origin.

thus first transformation is reflection on the origin.

next is exactly shifting 3 units down

source:

452,489 to the nearest thousand is 452,000