python 根据x的值和函数y=20+x2,计算y_new,算出y_new和y的差,记为delta_y。¶绘制x和delt_y的点图,并计算y的方差。有关方差的计算参阅数学资料。
0,1,2,3,4,5,6,7,8,9,10,11,12,13,14,15,16,17,18,19,20,21,22,23,24,25,26,27,28,29]y=[20,21,23,28,36,45,57,69,85,102,120,138,161,190,216,246,276,310,343,381,418,459,505,549