set term fig fontsize 20 set output 'kaiki2.fig' f1(x)=a1*x+b1 fit f1(x) 'migiagari' using 1:2 via a1,b1 f2(x)=a2*x+b2 fit f2(x) 'migisagari' using 1:2 via a2,b2 plot 'migiagari' pt 2,f1(x) w l,'migisagari' pt 2,f2(x) w l