Value B₂ (Eq. (26)) as a function of NFW gravitational potential for each cluster (thin lines). We overplot a thin blue line that shows μ(Φ/Φ₀) for Φ₀ = −1 700 000² m² s^-2. Note all clusters lie fairly close to this line, with some discrepancy due to our adopted NFW profile not representing the total potential. This B₂ correction to MOND allows the MOND interpolation function to run with the potential as well as the acceleration.