From maximum halo velocity |${V_{\rm max}^{\rm DMO}}$| to projected linewidth W₅₀/2 for the full sample. Each panel shows a velocity versus |${V_{\rm max}^{\rm DMO}}$| relation. A fit to each relation of the form y = a + b(x − x₀) is shown with solid (mean) and dashed (standard deviation) lines. The parameters of the fits are given in Table 1. For reference, the one-to-one line is shown with a dotted line. We see that the slope and scatter get progressively larger as we go from top left to bottom right.