y=bx+a x0=(1+1.5+2+2.5+3)/5=2,y0=(2.944 +2.481 +2.037 +1.678+ 1.234)/5=2.075b=[(1-2)(2.944-2.075)+(1.5-2)((2.481-2.075)+(2-2)(2.037-2.075)+(2.5-2)(1.678-2.075)+(3-2)(1.234-2.075)]/((1-2)^2+ (1.5-2)^2+...