Casey and melissa are 21-year-old students. they live together, shop together, prepare food together, and eat together whenever possible. casey, a male, is 5 ft, 6 in and 132 lb (60 kg) and the captain of the debate team and sedentary. melissa, a female, is 5 ft, 6 in and 154 lb (70 kg) and the captain of the lacrosse team and very active. melissa consumes more calories per day than casey does. compare casey’s and melissa’s nutritional needs, based on their ages, genders, sizes, and activity levels.

- "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."

yes

step-by-step explanation:

yes

cross multiplying, we get :

⇒ (3) × (5) = (9) × (x)

⇒ 15 = 9x