Using the calculation of coefficients of multiple linear regression and two-dimensional correlation. we studied the mutual influence (functional connectivity) between the amplitudes of EEG rhythms within one lead in mentally retarded persons. Multiple regression equations were geometrically interpreted using polycyclic multigraphs. As a result of the studies and calculations. https://www.roneverhart.com/San-Diego-Padres-Indigo-Graphite-Collection-1998-World-Series-Fitted-Hat/