Table 1.

Plots and covariation curves for the relationships presented in Figs. 2 and 3

PlotCovariation curve
Fig. 2a (aθ vs. b/a) aθ = 1/[2 + (b/a)]
Fig. 2b (bθ vs. b/a) bθ = 1/[1 + 2/(b/a)]
Fig. 2c (aθ vs. bθ) aθ = (1 − bθ)/2
Fig. 3 [b (z axis) vs. bθ (y axis) vs. θ (x axis)] bθ = b*θ (i.e., y = zx)
Fig. 3 (dashed line, where a = 1/2) bθ = b/(b + 1)
Fig. 3 (dashed-dotted line, where b = 1/3) bθ = 1/(6a + 1)
  • Each function is determined entirely by the biologically meaningful parameters a and b, and thus there are no free parameters in these covariation functions.