def plot_model_fit(fitted_model):
    
    """
    Sub-method to plot the fitted models.

    Returns:
    - - - -
    fig: matplotlib Figure object
    """

    [fig, gridspec] = fitted_model.plot(datafmt='o',
                                        data_kws={'alpha': 0.35},
                                        fit_kws={'c': 'r', 'linewidth': 3},
                                        fig_kws={'figsize': (12, 8)})

    return fig