What is the problem with this code? Finding distance and slope using python Oop

Question

class Line(object):
def __init__ (self,coor1,coor2):

# We are finding the slope and the distance

self.coor1 = coor1
self.coor2 = coor2

def distance (self):
x1,y1 = self.coor1
x2,y2 = self.coor2
return (((x2-x1)**2) + ((y2-y1)**2))**0.5

def slope (self):
x1,y1 = self.coor1
x2,y2 = self.coor2
return float(((y2-y1)/(x2-x1)))

coordinate1 = (3,2)
coordinate2 = (8,10)

a = Line(coordinate1, coordinate2)

a.distance()

a.slope()

Answer 1

class Line:
def __init__ (self,coor1,coor2):

# We are finding the slope and the distance

self.coor1 = coor1
self.coor2 = coor2

def distance (self,Line a):
x1= self.coor1
y1 = self.coor2
x2=a.coor1
y2=a.coor2
return (((x2-x1)**2) + ((y2-y1)**2))**0.5

def slope (self,Line a):
x1= self.coor1
y1 = self.coor2
x2=a.coor1
y2=a.coor2
return float(((y2-y1)/(x2-x1)))

Line coordinate1(3,2)
Line coordinate2(8,10)
coordinate1.distance(coordinate2)
coordinate1.slope(coordinate2)