"Easy CurveFit" is a very easy tool to fit curve. Only three steps you should do, and you'll get the fitting curve and the needed parameters. The models include linear and nonlinear. Regressions: 1. Linear Fit, y=a+bx; 2. Quadratic Fit, y=a+bx+cx^2; 3. Compound Fit, y=ab^x; 4. Logatithmic Fit, y=a+b*ln(x); 5. Exponential Fit, y=a*exp(bx); 6. Power Fit, y=a*x^b; 7. Inverse Fit, y=a+b/x; 8. hyperbola Fit, y=ax/(b+x); 9. Geometric Fit, y=ax^(bx); 10. Geometric Fit, y=ax^(b/x);