Establish a function model, which items have a strong relationship with the number of cars. First of all, after you copy and paste, the table below is in a mess, and the eyes that look at the data are spent. I'm too lazy to read it carefully. I can only provide some ideas. Generally, it has a strong relationship with the per capita disposable income of residents.

Tight monetary policies, such as raising interest rates and raising RMB deposit reserve, have a restraining effect on the number of private cars in this area. Because first of all, if you need a loan to buy a car, the repayment amount will increase because of the increase in interest; Secondly, for residents, the 20w cash, which is also used to buy a car, will increase the interest earned in the bank because of the interest rate increase, and the car is a depreciated product, so the people's desire to buy a car will be reduced.

The third problem is to establish a function, and the total amount of exhaust gas = (number of private cars × annual kilometers of private cars ×0.2+ number of buses × annual kilometers of buses) × emission value (this is a fixed value and has no influence on the function change).