Hyperbolic curve:	$y=\frac{vx}{K_s+x}$	(1)
pKa curve:	$y=\frac{{10}^{pH-p{K}_a}}{1+{10}^{pH-p{K}_a}}$	(2)
Two-phase decay:	$y=y_{min}+\left(y_{max}-y_{min}\right)\left[a{e}^{-k_{1}x}+\left(1-a\right)e^{-k_{2}x}\right]$	(3)
Sigmoidal curve:	$y=\frac{v{x}^h}{K_s+x^h}$	(4)
One-phase decay:	$y=y_{min}+\left(y_{max}-y_{min}\right)e^{-kx}$.	(5)