We assemble a statistical set of global mass models for \sim 2,000 nearly spherical Sloan Digital Sky Survey ( SDSS ) galaxies at a mean redshift of \langle z \rangle = 0.12 based on their aperture velocity dispersions and newly derived luminosity profiles in conjunction with published velocity dispersion profiles and empirical properties and relations of galaxy and halo parameters . When two-component ( i.e . stellar plus dark ) mass models are fitted to the SDSS aperture velocity dispersions , the predicted velocity dispersion profile ( VP ) slopes within the effective ( i.e . projected half-light ) radius R _ { eff } match well the distribution in observed elliptical galaxies . From a number of input variations the models exhibit for the radial range 0.1 R _ { eff } < r < R _ { eff } a tight correlation \langle \gamma _ { e } \rangle = ( 1.865 \pm 0.008 ) + ( -4.93 \pm 0.15 ) \langle \eta \rangle where \langle \gamma _ { e } \rangle is the mean slope absolute value of the total mass density and \langle \eta \rangle is the mean slope of the velocity dispersion profile , which leads to a super-isothermal \langle \gamma _ { e } \rangle = 2.15 \pm 0.04 for \langle \eta \rangle = -0.058 \pm 0.008 in observed elliptical galaxies . Furthermore , the successful two-component models appear to imply a typical slope curvature pattern in the total mass profile because for the observed steep luminosity ( stellar mass ) profile and the weak lensing inferred halo profile at large radii a total mass profile with monotonically varying slope would require too high DM density in the optical region giving rise to too large aperture velocity dispersion and too shallow VP .