def slope_intercept(point1, point2):
    """Returns the slope and intercept between point1 and point2.
    
    Parameters
    ----------    
    point1 : tuple
       e.g. (1.3, 4)
       
    point2 : tuple
    
    Output
    ------      
      A tuple(slope, intercept)"""
    x0, y0 = point1
    x1, y1 = point2
    slope = (y1 - y0) / float(x1 - x0)
    intercept = y1 - slope * x1
    return slope, intercept
