def get_last_coefficient(points):
    """
    Computes the last coefficient of the Lagrange Polynomial over the given
    points.
    """
    total = 0
    for x1, y1 in points:
        partial = 1
        for x2, y2 in points:
            if x1 != x2:
                partial *= (x1 - x2)
                
        total += y1 / partial
    
    return total