[求助]如何求出函数表达式？
x=[-2005.18774，-176.903191，1292.067478，859.336087，771.7266316，327.546568，-1478.3107]
y=[-465.189718，-41.0403195，544.4413107，479.943397，610.9354918，317.374685，-1432.4029]
z=[-6039.86603，-6378.41532，-6225.05472，-6304.62979，-6304.62979，-6364.6799，-6039.8663]
如何求出函数表达式？ 请各位帮帮忙！！谢谢！！！:lovely:
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