Black hole mass and Eddington ratio estimates for NDWFS J1425+3254 from single-epoch mass-scaling relations (Equation 1) using the 5100 Å continuum luminosity and Hβ line FWHM (blue; second-left panel), the Hβ line luminosity and FWHM (yellow; middle panel), and the Hα line luminosity and FWHM (purple; right panel). Each distribution shows estimates using various calibrations to these relations: Greene & Ho (2005, G05), Vestergaard & Peterson (2006, V06), Dalla Bontà et al. (2020, DB20), Dalla Bontà et al. (2025, DB24) and Cho et al. (2023, C23). The green curves show the combined probability distributions across each of the calibrations from each equation, and from all equations combined (left-most panel), giving each calibration and equation equal weighting. The horizontal black lines mark the minimum, median, and maximum for each distribution. The probability distribution reflects the posterior distribution from the MCMC fit, i.e. only the uncertainty in the fitting parameters is included and not the ∼0.4 dex scatter from the scaling-relation conversion to a black hole mass. The top panels show the black hole mass estimates, and the bottom panels show the resulting Eddington ratios.