求一元线性回归方程Y=aX+b a,b的值.期中 X1,X2,……X31=40,41,42,43,44,45,46,47,48,49,50,51,52,53,54,55,56,57,58,59,60,61,62,63,64,65,66,67

求一元线性回归方程Y=aX+b a,b的值.期中 X1,X2,……X31=40,41,42,43,44,45,46,47,48,49,50,51,52,53,54,55,56,57,58,59,60,61,62,63,64,65,66,67,68,69,70.
Y1,Y2,Y3 ……Y31=60,61,62,63,64,65,66,67,68,69,69,70,71,72,73,74,75,75,76,77,78,79,79,80,81,82,82,83,84,84,85