Figure 4.1.1.1 Boxplot
Figure 4.1.1.2 Heat map
Figure 4.1.1.5 Linear graph of date characteristics and used car prices
Figure 4.1.1.6 Data distribution histogram
From the above analysis, we can preliminarily know that the main factors affecting the price of used cars are new car price, displacement, and the service life of the car.
4.1.2 Data processing
