Question

Check whatever there is a direct or an inverse proportion in the following cases. Give reason to support your answer.

i) Number of water bottles and their cost

ii) Time taken and the distance covered at a uniform speed of vehicle

iii) Distance traveled and there fare charge for it

iv) Number of person and the number of days for which the food should last

Answer 1

(A) As the cost of water bottles increases with increase in number of bottles, thus there is a direct proportion between the number of bottles and their cost.

(B) If a vehicle in moving with a uniform speed, then the distance cover is directly proportional to the time taken by the vehicle.

(C) The fare charge increases with increase in distance, thus there is a direct proportion between the distance travelled and fare charge for it.

(D) If the number of persons increases then food will last for less number of days and vice versa, thus there is an inverse proportion between the number of person and the number of days for which the food should last.