static void Main(string[] args)
        {

            int x1;
            int x2;
            int y1;
            int y2;
            double m;
            double yint;

            Console.Write("Enter x1 value: ");
            x1 = Convert.ToInt16(Console.ReadLine());
            Console.Write("Enter x2 value: ");
            x2 = Convert.ToInt16(Console.ReadLine());
            Console.Write("Enter y1 value: ");
            y1 = Convert.ToInt16(Console.ReadLine());
            Console.Write("Enter y2 value: ");
            y2 = Convert.ToInt16(Console.ReadLine());

            Console.WriteLine();

            m = slope(x1,x2,y1,y2);
            yint = yInt(x1, y1, m);

            Console.WriteLine("Slope: " + m);
            Console.WriteLine("Y-Intercept: " + yint);
        }

        //x1,x2,y1,y2
        static double slope(int a, int b, int c, int d)
        {
            double m = (d-c) / (b-a);
            return m;
        }

        //x,y,slope
        static double yInt(int a, int b, double c)
        {
            double testNum = a*c;
            double yIntercept = b - (testNum);
            return yIntercept;
        }