数学建模——中国人口模型分析
程序： shuju={{0,20.6851},{1,20.6984},{2,20.7102},{3,20.7240 },{4,20.7397},{5,20.7529},{6,20.7659},{7,20.7801},{8,2 0.7957},{9,20.8122},{10,20.8279},{11,20.8429},{12,20. 8572},{13,20.8702},{14,20.8817},{15,20.8932},{16,20. 9043},{17,20.9149},{18,20.9253},{19,20.9354},{20,20. 9449},{21,20.9537},{22,20.9603},{23,20.9672},{24,20. 9737},{25,20.9797},{26,20.9855},{27,20.9914},{28,20. 9967},{29,21.0019},{30,21.0070}}; f1[x_] = Fit[shuju, {1, x}, x] 结果为： 20.7065 + 0.0111379 x r =0.0111379