import math


class Line:
    def __init__(self, m, b):
        self.m = m
        self.b = b

    def __call__(self, x):
        return self.m * x + self.b

    @classmethod
    def from_points(cls, p1, p2):
        x1, y1 = p1
        x2, y2 = p2
        m = (y2 - y1) / (x2 - x1)
        b = y1 - m * x1
        return cls(m, b)

    @classmethod
    def from_point_and_slope(cls, point, m):
        b = point.y - m * point.x
        return cls(m, b)

    def __repr__(self):
        m = self.m
        b = self.b
        return f'Line({m=}, {b=})'