#include <stdio.h>
  int main()
  {

	FILE * fStock;

	fStock = fopen("TSLA.txt" , "r");

	int count=0;

	if(fStock != NULL)

	{

	    char singleLine [10];

	    fgets(singleLine, 10, fStock);

	    while("feof(fStock)" !=NULL);
	}

	{

	        if(count==1);

            else(count++);

            int x1, y1, x2, y2;

            float slope;

            slope = ((1.0)* (y2 - y1)) / (x2 - x1);

            printf("Slope = %.2f\n", slope);

            fclose(fStock);
	}
            return 0;
  }