Left: C IV parameter space colored by Γ. Right: C IV parameter space colored by Δα _ox. The error bars are the same as those used for Figure 2. The markers are the same as for the top panel of Figure 4. The Chandra/HST sample, the SDSS-RM sample, and the Nardini et al. (2019) sample are highlighted in black. Though general trends exist in both parameter spaces, outliers are possible at all values of C IV EQW and blueshift.