Is it just me or whenever you try to answer a question and it says the servers are swamped and you need to wait for you answer to load and then you have to change your answer for it to work?

i think its just you

Step-by-step explanation:

That happens to me too.

Step-by-step explanation:

I don't know how to make that stop happening.

Hope this helps!! :)

- "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."