A container ship left Diego Garcia and traveled north at an average speed of 15
mph. A cruise ship left at the same time
and traveled in the opposite direction with
an average speed of 25 mph. Find the
number of hours the cruise ship needs to
travel before the ships are 200 mi. apart.

- "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."

-60.75

step-by-step explanation:

just add the numbers then put the negative sign on it