β_UV − β_opt space distribution of RUBIES sources with robust z_spec > 3.1 (gray histogram). On the right, we plot objects that satisfy our condition for broad-line, unresolved, and v-shaped features, along with their combinations, above the full distributions of the parent sample. On the left, we plot the objects that satisfy all three criteria. The slopes are derived from PRISM spectroscopy and each panel includes the total number of objects plotted and their fraction of the represented sample. The points are colored as in Figure 7.