Luminosity–metallicity relationship for the star-forming galaxies from the Hα dot survey. The solid circles represent [O iii]-detected objects, while the open circles are lower-redshift Hα-detected galaxies. The solid line is the best-fit linear relation for the local sample of KISS galaxies found in Figure 3 of Salzer et al. (2009), offset to account for the difference in the filter used to derive the luminosity. The dashed line is the best-fit line through the [O iii]-detected KISS galaxies from the same paper. The [O iii]-detected Hα dots appear to follow the same L–Z relation previously noted for the KISS galaxies.