Question

The petrol consumption of your car is 16 Kilometers per litre. Let x be the distance you travel in Kilometers and p the price per litre of petrol in Rupees. Write expressions for demand for Petrol?

Answer 1

x – Total distance in Km.

p – Price per litre in rupees.

Equation of demand function joining two data points (16, 1) and (8, 2) respectively.

– 8y + 8 = x – 16

x – 16 – 8 + 8y = 0 

x + 8y – 24 = 0 

x = 24 – 8y

y = p 

∴ The demand function x = 24 – 8p

Demand ∝ 1/Price