In finance, we need to do partial observations of data and estimate the data generating process (DGP) -- for example, log-normal returns. Sometimes, we can observe only the data points of a certain process, but we don't know what is the function generating the process. Consider the following graph is a plot of the f(x), of a function f(x) given. What is the underlaying function ( f(xi)) that is the generator of the observed points in the plot f(xi), for points x1=1,x2=0.9,,xn=1? In finance, we need to do partial observations of data and estimate the data generating process (DGP) -- for example, log-normal returns. Sometimes, we can observe only the data points of a certain process, but we don't know what is the function generating the process. Consider the following graph is a plot of the f(x), of a function f(x) given. What is the underlaying function ( f(xi)) that is the generator of the observed points in the plot f(xi), for points x1=1,x2=0.9,,xn=1