class Point:
    def __init__(self):
        self.x = 0
        self.y = 0
    def make_point(self,x,y):
        self.x = x
        self.y = y        

class Line(Point):
    def __init__(self):
        self.slope = 0
        self.y_intercept = 0    
    def make_line(self, p1, p2):
        self.slope = (p2.y - p1.y)/(p2.x - p1.x)
        self.y_intercept = p1.y - self.slope*p1.x