Mathematical Modelling of the Gross Domestic Product of the Philippines

Gross Domestic Product (GDP) reflects a country’s economy. The higher the Gross Domestic Product (GDP), the healthier is the economy. Th objective of this study is to determine the best fit model to forecast the Gross Domestic Product (GDP) of the Philippines for the next five years (2022 – 2026). Using simple linear regression and multiple linear regression, the researcher found that there is significant linear relationship between the Gross Domestic Product (GDP) and unemployment rate, population, household expenditure, and government expenditure. Multiple linear regression also showed that the only significant predictors are population, household expenditure, and government expenditure. By the results of graphing and using formulas available in the Microsoft excel, the researcher determined that the best fit model is sextic. This study can be considered by the government of the Philippines in making decisions in implementing policies for economic growth and stability.