A175x的精选

问题详情：三点(3,10),(7,20),(11,24)的线*回归方程为()A.=1.75x-5.75            B.=1.75x+5.75C.=-1.75x+5.75       D.=-1.75x-5.75【回答】B.设回归直线方程为=x+,=(x1+x2+x3)=7,=(y1+y2+y3)=18...