<SYSTEM_TASK:>
Solve the following problem using Python, implementing the functions described below, one line at a time
<END_TASK>
<USER_TASK:>
Description:
 def slope(self, other):
 """ Determines the slope between this point and another point. Args: other (AffinePoint):
 The second point. Returns: int: Slope between self and other. """

        X1, Y1, X2, Y2 = self.X, self.Y, other.X, other.Y
        Y3 = Y1 - Y2
        X3 = X1 - X2
        return (Y3 * self.inverse(X3)) % self.P