Rest-frame UV emission line ratios of the MUSE stacked galaxies compared with the Gutkin et al. (2016) models. Panels from left to right are similar to Fig. 6. Galaxies are stacked in mass and redshift bins, and the line width of the markers increases with mass and redshift. Limits resemble stacks with emission lines (considered in each panel) lower than the 3σ error limit. For such stacks, 3σ error is used as the respective line flux. Top panel: MUSE-stacked sample for stellar mass bins log₁₀(M_*/M_⊙) < 9.5, 9.5 <  log₁₀(M_*/M_⊙) < 10.0, and log₁₀(M_*/M_⊙) > 10.0. Bottom panel: MUSE-stacked sample for redshift bins z <  2.5, 2.5 <  z <  3, and z >  3.