log(N/O) vs. 12+log(O/H) diagram for our sample of LINERs. The dots represent galaxies classified as wAGN, and the chemical abundances correspond to AGN models with α_OX = −1.6. The stars correspond to galaxies classified as RG whose chemical abundances were estimated assuming pAGB models with T_eff = 1 ⋅ 10⁵ K. The color bar shows different properties: (a) The ionization parameter as estimated from emission lines. (b) The sulfur ratio tracer of the electron density. (c) The stellar mass as retrieved from the NSA catalog. (d) The HI mass as retrieved from the NSA catalog. (e) The equivalent width of Hα. The empty symbols correspond to galaxies without a measurement of the represented property.