A retail store is having a back to school sale on chrome books. At 10 am the store has sold 8 chrome books. At 7 pm the store discovers that it has sold 32 chrome books. What is the average rate of change between 10 am and 7pm

no problobm

step-by-step explanation:

lol we need to see what the question is asking about

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."