How are the curve fits in KaleidaGraph calculated?

Here are our references for the various curve fits:

General and Cubic Spline Curve Fits

Press, W. H., Flannery, B. P., Teukolsky, S. A., and Vetterling, W. T. Numerical Recipes in C. Cambridge University Press, New York (1988).

Linear, Polynomial, Exponential, Logarithmic, and Power Curve Fits

Beyer, W. H. Standard Mathematical Tables. CRC Press, Cleveland (1976).

Linear Curve Fit Statistics

Zar, J. H. Biostatistical Analysis. Prentice-Hall, Upper Saddle River, NJ (1999).

Smooth and Interpolate Curve Fits

Stineman, R. W. A consistently well-behaved method of interpolation. Creative Computing, July (1980).

Weighted Curve Fit

Chambers, J. M., Cleveland, W. S., Kleiner, B., and Tukey, P. A. Graphical Methods for Data Analysis. Duxbury Press, Boston (1983).