Point-to-point correlation between thermal and non-thermal components for Abell 2142 at 25 arcsec resolution. Top panels show the 25 arcsec boxes used to probe the correlation, colourised according to the halo component (H1: yellow, H2: cyan, H3: powder blue). Colourscale shows the XMM-Newton surface brightness, with contours denoting the surface brightness measured by XMM-Newton, MeerKAT, and LOFAR (both at 25 arcsec resolution). Radio contours start at 3σ and scale by a factor $\sqrt{2}$ as per Fig. 3. Bottom panels show the I_R/I_X plane for components H1, H2, and H3, as well as the best-fit slope derived by Linmix. The slopes are shown in the inset, as well as in Table 5.