/* Laboratory Assignment 4
   Problem 2   
   Name:      
   Roll No:                  */

/* REPLACE ALL UNDERSCORES ( _ ) WITH APPROPRIATE WORDS */ 

#include <stdio.h>
#include <math.h>

/* Linear Regression y = m * x + c */

main()
{
	float m;
	float c;
	float Sumx = 0.0;
	float Sumxx = 0.0;
	float Sumy = 0.0;
	float Sumyy = 0.0;
	float Sumxy = 0.0;
	float xdata[100];
	float ydata[100];
	int	  i;
	int	  n;

	printf("Input the number of data points --> ");
	scanf("%d",&n);
	i = 0;
	while ( ______ )
	{
		printf("%d out of %d : ",i,n);
		scanf("%f%f",___,_____);
		i++ ;
	}

	i = 0;
	/* Other quantities like Sumx etc are initialized in the declarations */
	while ( i < n )
	{
		Sumx = Sumx + xdata[i];
		Sumy = Sumy + ydata[i];
		Sumxx = ___________
		Sumxy = __________
		Sumyy = __________
		i++;
	}
	m = (n*Sumxy - Sumx * Sumy)/(n*Sumxx - Sumx*Sumx);
	c = (Sumy*Sumxx - Sumx * Sumxy)/(n*Sumxx - Sumx*Sumx);
	printf("m = %f\nc  = %f\n",m,c);
	
	/* WRITE CODE FOR PRINTING THE TABLE. */
}