The Study and Application of China's Population Growth

First based on figures presented in the historical data, this paper first uses Malthus’ model of population growth as reference and establishes the mathematical model 1 about China’s population size and time by adopting the methods of regression and fitting; second through the adaptation of linear multiple regression method to make regression and fitting on the total number of population and the above three factors, a ternary linear regression model 2 is made; finally we find two factors: mortality rate, birth rate have great significance for the number of population, by using multiple regression, establishes the model 3.