Parameter trend distributions. The k and K of models with probabilities >10-6 were normalized by their means and fitted to straight lines versus the integers 1 to 4 to yield normalized slopes, i.e. parameter trends. The number of models within each quadrant is shown in the plots; models on axes (constant k and/or constant K) are excluded from these counts. Based on these counts, the 2nd, 3rd, and 5th datasets group together in that none of them have a model in the lower right quadrant.