  Recently, from the new Spitzer Photometry and Accurate Rotation Curves
(SPARC) data, McGaugh et al. (2016) reported a tight Radial Acceleration
Relation (RAR) between the observed total acceleration and the acceleration
produced by baryons in spiral galaxies. The relation can be fitted by different
functions. However, these functions can be discerned if we express the data in
the form of halo acceleration relation (HAR). The data reveals a maximum in the
halo acceleration. We examined NFW (cusp) and Burkert (core) profiles in the
context of dark matter and different parameter families of the interpolating
function in the framework of Modified Newtonian Dynamics (MOND).
