Properties of SDSS J1011+5442 in space of L_α vs. L₅₁₀₀ (top panel) and of BH mass vs. stellar velocity dispersion (bottom panel). In the top panel, the small blue dots with error bars show the results for the selected 1158 unobscured SDSS quasars from Shen et al. (2011), and the solid, dotted, and dashed red lines show the best-fitting results ($L_{\alpha }\propto L_{5100}^{1.16\pm 0.02}$) and the corresponding 1RMS and 3RMS scatters. The solid purple and blue circles plus error bars show the results for SDSS J1011+5442 in the dim and the bright state, respectively. In the bottom panel, open red, blue, and cyan circles plus error bars show the results for the quiescent galaxies in Savorgnan & Graham (2015), the reverberation-mapped broad-line AGN in Woo et al. (2015), and the tidal disruption events in Zhou et al. (2021). The solid and dashed red lines show the best-fitting results for the dependence and the corresponding 5σ confidence bands. The dashed dark green, purple, and green lines show the determined results for the dependence from Savorgnan & Graham (2015), Kormendy & Ho (2013), Woo et al. (2015). The solid purple and blue circles plus error bars show the results for SDSS J1011+5442 in the dim and bright state, respectively.