An engineer is testing the magnetic field of a high-intensity neodymium disc magnet for a magnetic levitation system. They measure the magnetic flux density, BBB, in millitesla (mT\text{mT}mT), at various axial distances, zzz, in millimetres (mm\text{mm}mm), from the surface of the magnet.
The engineer plots the experimental results on the grid in Figure 1.
Draw a curve of best fit on the graph in Figure 1.