Python求直線的方程

def GeneralEquation(first_x,first_y,second_x,second_y):
    # 一般式 Ax+By+C=0
    A = second_y-first_y
    B = first_x-second_x
    C = second_x*first_y-first_x*second_yreturn A, B, C

以上是返回一般式方程的Ax+By+C=0的A、B、C

 

def GeneralEquation(first_x,first_y,second_x,second_y):
    # 一般式 Ax+By+C=0
    A = second_y-first_y
    B = first_x-second_x
    C = second_x*first_y-first_x*second_y
    k = -1 * A / B
    b = -1 * C / B
    return k, b

以上是返回截距式方程的y=kx+b的k和b