FitLogistic Command

FitLogistic( <List of Points> ): Calculates the regression curve in the form $\frac{a}{1+b e^{-kx}}$ .

FitLogistic({(-6, 2), (0, 2), (3, 4), (3.4, 8)}) yields $\frac{1.98}{1 - 0.03 e^{1x}}$ .

The first and last data points should be fairly close to the curve. The list should have at least 3 points, preferably more.
See also Fit, FitExp, FitGrowth, FitLine, FitLineX, FitLog, FitPoly, FitPow and FitSin.
If you work with big/small numbers, you should consider normalizing them for a more accurate result, see Normalize Command.