all of the discussed multivariate statistical methods like MLR ,NLR ,and SLR have been utilized to construct the relevant models. The predicted models are established based on explanatory variable(s). The regression models are utilized to find out regression coefficients.When fitting data with regression, our main objective is often to discriminate between different models. The logical step following model development is model validation. The purpose of verification is to find the best model among three models. We can obtain the relational expression among fitted freight volume, GDP and the fixed investment based on MLR,NLR, and SLR