Radial α_{¹²CO(1−0)} and DGR trend in M101. The left panel shows radial α_{¹²CO(1−0)} trend, and the right panel illustrates radial DGR dependency. Top: smaller blue (pink) points show the individual α_{¹²CO(1−0)} (DGR) measurements for the various solution pixels. Larger red (yellow) points show the derived trend based on binning the data. Bottom: residual α_{¹²CO(1−0)} or DGR values after subtracting the radial trend based on linearly interpolating the binned data trend (solid red /yellow line).