Aileen lists the quiz scores for random samples of seventh grade
School X: 70, 72, 74, 84, 89, 89, 93, 94, 95, 100
School Y: 67, 68, 72, 80, 86, 86, 88, 90, 90, 96
How much greater is the interquartile range of the quiz scores for the School X
mple than the
for the School Y sample?

you forgot an image

step-by-step explanation:

- "runner b is moving at a slower rate."

- "the graphs shown are graphs of distance(km) against time(min).

the slopes of this graphs are are given by:

slope = (change in y)/(change in x)

= (change in distance)/(change in time)

this is the formula for finding the speed. so, the slope of these graphs represent the speed of the runner.

taking each division in the graph to represent 1 on both axis:

runner a ⇒ speed = (2-0)/(1-0)

= 2/1

= 2 km/min

runner b ⇒ speed = (3-0)/(3-0)

= 3/3

= 1 km/min

this shows that   runner b is moving at a slower rate."