x,y,X=log x,Y=log y,X^2,XY
2,0.5,0.3,-0.3,0.09,-0.09
2.5,0.9,0.4,-0.05,0.16,-0.02
3,1.5,0.48,0.18,0.23,0.86
3.5,2.2,0.54,0.34,0.292,0.184
4,3.2,0.6,0.51,0.36,0.306
-,-,2.32,0.68,1.132,0.486