Total 9, 18, 90, and 140μm luminosities vs. total K_s-band luminosities for IR measurements with S/N > 2.4, 2.2, 2.7, and 2.8, respectively (solid circles). Conversely, open triangles indicate 2.4, 2.2, 2.7, and 2.8σ upper limits, respectively. Blue and red data points denote CO-detected and non-CO-detected galaxies, respectively. Linear correlation coefficients (R) and p-values for CO-detected and non-CO-detected galaxies are indicated in blue and red, respectively, for galaxies above the stated S/N thresholds. Solid black lines show the best linear fits to the non-CO-detected galaxies only, excluding upper limits (see Table 2). The bottom four panels are the same as the top four panels, but without upper limits.