{
Argument=x
Fit_var=a0,a1,b0,b1
Expression=(a0+a1*x)/(b0+b1*x)
}
{
Argument=x
Fit_var=a0,a1,a2,b0,b1,b2
Expression=(a0+a1*x+a2*x^2)/(b0+b1*x+b2*x^2)
}
{
Argument=x
Fit_var=a0,a1,a2,a3,b0,b1,b2,b3
Expression=(a0+a1*x+a2*x^2+a3*x^3)/(b0+b1*x+b2*x^2+b3*x^3)
}
{
Argument=x
Fit_var=a0,a1,a2,a3,a4
Expression=a0+a1*exp(a2*x)+a3*exp(a4*x)
}
{
Argument=x
Fit_var=a0,a1,a2,a3,a4,a5,a6
Expression=a0+a1*sin(a2+a3*x)+a4*cos(a5+a6*x)
}
{
Argument=x
Fit_var=a,b,c
Expression=a+b*x^c
}
{
Argument=x
Fit_var=a,b,c,d
Expression=a+b*(x-c)^d
}
{
Argument=x
Fit_var=a,b,c,d
Expression=a+b*abs(x-c)^d
}
{
Argument=x
Fit_var=a,b,c,d
Expression=a+b*sin(c*x+d)^2
}

Laplace Function
{
Argument=x
Fit_var=a,b,c,d
Expression=a+b*exp(c*abs(x-d))
}

{
Argument=x
Fit_var=a,b,c
Expression=a/(1+exp(b*(x-c)))
}
