我知道多组数据x1、x2、y的值。 如何通过拟合计算方程y=-d(x1*lnx2) ^n？ 你知道里面的系数d，n吗？ 谢谢您告诉我具体的编程代码。
x1 x2 y
25 0.678413863 -0.38799776
25 0.747284679 -0.29130907
25 0.791562572 -0.233746348
25 0.824843341 -0.1925618
25 0.845030328 -0.168382761
25 0.873710259 -0.135006469
25 0.90795372 -0.096561871
25 0.945374652 -0.056173973
30 0.639784554 -0.446623794
30 0.700286045 -0.356266392
30 0.744002191 -0.295711299
30 0.777615483 -0.251523115
30 0.80831964 -0.212797705
30 0.838530826 -0.176103935
30 0.874018623 -0.134653595
30 0.921788084 -0.081439926
35 0.602075521 -0.507372391
35 0.672336923 -0.39699569
35 0.723478242 -0.323684807
35 0.754780021 -0.281328935
35 0.782686186 -0.245023447
35 0.810532397 -0.210063967
35 0.844891864 -0.168546632
35 0.894408956 -0.111592163
40 0.584659524 -0.536725611
40 0.652344132 -0.427183047
40 0.683297816 -0.380824473
40 0.710106747 -0.342339972
40 0.734628243 -0.3083907
40 0.76045475 -0.27383867
40 0.793456373 -0.231356722
40 0.848169075 -0.164675283
45 0.556281726 -0.586480412
45 0.628263234 -0.464796038
45 0.65920504 -0.416720655
45 0.684259427 -0.379418154
45 0.707609681 -0.345862635
45 0.73222897 -0.311662013
45 0.768206128 -0.263697186
45 0.822031363 -0.19597673