Various mathematical curves fit these three centuries of data. (creationscience.com)
Dave in Canmore — you are right = the patterns are better selected by eyeballing the actual data and not slavishly following mathematical curves see Figs 5 — 9 in the link provided above. (wattsupwiththat.com)
A perforation pattern derived from mathematical curves and gradations in perfect alignment gives the seats a particularly contemporary appearance. (theintelligentdriver.com)