The table below shows the number of calories used per minute

The table below shows the number of calories used per minute as a function of an individual\'s body weight for three sports: Determine the number of calories that a 150 lb person uses in one half-hour of walking. Who uses more calories, a 120 lb person swimming for one hour, or a 170 lb person bicycling for a half-hour? The 120 lb person swimming for one hour The 170 lb person bicycling for a half-hour They both use the same amount of calories Does the number of calories of a person bicycling increase or decrease as weight increases? Increase Decrease

Solution

(a)

number of calories for 150lb person in 1 minute for walking =4 calories

we know that

1 half an hour = 30 minute

number of calories for 150lb person in 30 minute for walking =4 calories*30

number of calories for 150lb person in 30 minute for walking =120 calories........Answer

(b)

For swimming:

120lb person in 1minute = 6.9 calories

we know that

1 hour = 60 min

120lb person in 60minute = 6.9 calories*60

120lb person in 1 hour =414

For bicycling :

170 lb in 1 minute =9.2

we know that

a half hour = 30 min

170lb in 30 min =9.2*30

170lb for half an hour =276

We can see that 120lb person in 1 hour > 170lb for half an hour...........Answer

(c)

For Bicycling:

We can see that

For 100lb : 5.4

For 120lb : 5.5

For 150lb : 8.1

we can see that number of calories increases as weight increasing

So, It increases .........Answer