Least Square Exponential Model Program

#include<stdio.h>

#include<stdlib.h>

#include<math.h>

int main(){

int n,i,j;

float a,la,b,x[10],y[10],sx,sly,sxly,sx2;

printf("Saroj Rana\nRoll:37\tSem:3rd\n");

printf("Enter number of points:");

scanf("%d",&n);

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

printf("Enter value for x and y at i=%d\n",i);

scanf("%f%f",&x[i],&y[i]);

}

   sx=0;

   sly=0;

   sxly=0;

   sx2=0;

   for(i=0;i<n;i++){

       sx=sx+x[i];

       sly=sly+log(y[i]);

       sxly=sxly+x[i]*log(y[i]);

   sx2=sx2+x[i]*x[i];

   }

   b=((n*sxly)-(sx*sly))/((n*sx2)-(sx*sx));

   la=(sly/n)-(b*sx/n);

   a=exp(la);

   printf("Equation of type y=a*e^(bx)\n");

   printf("Straight line equation: y=%f*e^(%fx)",a,b);

   getch();

   return 0;

}