A man hires an auto rickshaw to cover a certain distance. The fare is ₹ 20 for first Km and ₹ 9 for subsequent kilometers. Taking total distance covered as x Km and fare ₹ y. (a) Write a linear equation in this (b) The man covers a distance of 15 Km and gave ₹ 150 to the auto driver. Auto driver said “It is not the correct amount” and returned him the balance. Find the correct amount paid back by the auto driver. Which value is depicted by the auto driver?