#include<math.h>

#include<stdio.h>

main(){

   int n,i;

   float x,y,m,c,d;

   float sumx=0,sumxsq=0,sumy=0,sumxy=0;

   printf("enter the number of values for n:");

   scanf("%d",&n);

   for(i=0;i<n;i++){

      printf("enter values of x and y");

      scanf("%f%f",&x,&y);

      sumx=sumx+x;

      sumxsq=sumxsq+(x*x);

      sumy=sumy+y;

      sumxy=sumxy+(x*y);

   }

   d=n*sumxsq-sumx*sumx;

   m=(n*sumxy-sumx*sumy)/d;

   c=(sumy*sumxsq-sumx*sumxy)/d;

   printf("M=%f\tC=%f\n",m,c);

}