y=-396.523758947399 4579.41318765518 -172.638099629557 56.7959269001142x1=4579.41318765518 -172.638099629557 56.7959269001142 -141.012691259653x2=1689126149407.64 1692222538236.47 1694929412250.16 1703165620347.86怎么做y=x1+x2的回归