Logarithmic integrated line emission in K km s⁻¹ of all lines compared on a pixel-by-pixel scale. We show the 2D distribution of emission from both significant detections (colored points, > 3σ) and non-detections (gray points, < 3σ). The color scale of both detected and undetected points indicates the point density and is for visual purposes only. We mark pixels inside the central 1 kpc (in diameter, ∼8″) in cyan. The dashed gray line corresponds to a power-law with a slope of unity and offset b being the average line ratio calculated from pixels with significant detections, including the central pixels. We define b = mean(log₁₀(y/x)), with x and y referring to the values on the x and y axes. We further show b_cen (dashed blue line) and b_disk (dashed green line) which were calculated using only pixels inside and outside the central 1 kpc, respectively. b_disk and b often overlap. Uncertainties were calculated following Gaussian error propagation and are listed together with all values of b in Table D.1.