Top left panel: non-parametric velocity width, w₈₀ derived from integrated spectrum versus X-ray luminosity measured in the 2–10 keV band. The red data points represent the SUPER sample, the grey data points show the luminosity and redshift-matched sample from the KASHz survey, and the green data points show the high-luminosity sample from the WISSH survey. The dashed red line shows the best fit relation for SUPER galaxies, the dashed grey line shows the best fit relation for the matched KASHz sample, and the blue line shows the overall relation for the SUPER, KASHz, and WISSH samples (Bischetti et al. 2017). Top right panel: w₈₀ versus bolometric luminosity. Bottom left panel: w₈₀ versus black hole mass, M_BH. Bottom right panel: w₈₀ versus Eddington ratio (L_bol/L_Edd). In all the plots, the blue line shows the best fit to all the data points within the plot. The values plotted for the SUPER sample are obtained from Tables 1 and 3.