Therefore, the coefficients of the best-fit lines should not be relied on as ironclad quantitative relationships. Nevertheless, the sampled MPs encompass a broad range of ∆G OH values that are relevant to ORR, and the linear relationships show good fits to the data. Thus, the trends that emerge between functionals, which correlate well with the amount of exact exchange included in those functionals, represent real differences between functional predictions and not the effects of noise.