Rectangular hyperbola function.
Reference: Ratkowksy, David A. 1990. Handbook of Nonlinear Regression Models. Marcel Dekker, Inc. 4.2.16
Number: 2
Names: a, b
Meanings: a = coefficient, b = coefficient
Lower Bounds: none
Upper Bounds: none
nlf_recthyperbola(x,a,b)
FITFUNC\RECTHYPB.FDF
Hyperbola