Photon spectral index (Γ; top panel) and reflection fraction (R; bottom panel) as a function of Eddington ratio (λ_Edd). The red dots denote NGC 315 and NGC 4261. The blue dots and the dashed black line correspond to the results obtained from Jana et al. (2023). The dashed maroon, dark yellow, and green lines in the bottom panel correspond to the fitting lines for their samples from Gu & Cao (2009), She et al. (2018), and Diaz et al. (2023), respectively.