The line appears on the legend but on the plot...

Hello, I wanna plot with a line and with ".". the line appears blue in the box of the legend but in the plot only the points.

for j = 1:n_var % Fazer as variáveis todas
    original = figure('name',titulo1{j});
    set(original,'PaperUnits','centimeters','PaperPosition',[0 0 29 21],'PaperOrientation','landscape');
    plot(t_ref(:,1),var_u1200lab(:,j),'-b.','MarkerSize',9);    
    set(gca,'FontSize',10);
    grid on
    title(['U-1200: ' var{j}],'FontSize',12,'Color','black','FontWeight','bold');
    xlabel('tempo');
    ylabel(titulo(j));
    legend(var_original(j),'Location','best','orientation','vertical','linewidth',0.5); 
    ax = gca; % Eixos
    ax.XAxis.LineWidth = 1.5;
    ax.YAxis.LineWidth = 1.5;
    ax.GridLineStyle = '-';
end