Question

where do we need function in daily life.​

Answer 1

Answer:

Population is a function of time. Postage cost is a function of weight and destination. School grades are a function of hours of study. Taxi fare is a function of distance.

Answer 2

A Shadow - The length of person's shadow along the floor is a function of their height. Driving a Car - When driving a car, your location is a function of time. You see, Quantum Physics notwithstanding, you can't be in two places at once. Therefore, the vehicle's position is a function of time.