Dependence of inflection point position (in fractions of rotation period, P_rot = 30 d) on spot lifetime, T_spot. Each value of the spot lifetime corresponds to five realizations of spot emergences with linear (red asterisks) and five realizations with exponential (blue asterisks) decay laws. Lower panel: zoom in of the upper panel. Blue and red lines in the lower panel show positions of the high-frequency inflection points averaged over corresponding five realizations.