This section deals with test for stationarity in time series data (Food Price Index) from January 2007 to April 2024 in Nigeria. The stationarity test is carried out by data visualization using time plot of the data, the ACF plot and the PACF plot of the Food Price Index. Then, Unit Root Test, that is Augmented Dickey Fuller (ADF) Test is performed to ascertain the stationarity of the time series data.