Best fit line

	Divisor = (nPoints * Sum(x^2))  - (Sum(x) * Sum(x));
              a = ((Sum(y) * Sum(X^2))  - (Sum(x) * Sum(x*y))) / Divisor;
              b = ((nPoints * Sum(x*y)) - (Sum(x) * Sum(y))) / Divisor;

	Formula:

	      y = a + bx // Satisfies least-squares line for points