According to classical economics, saving is afunction of the rate of interest. The higher the rate of interest, the more money will be saved. Investment is also a function of the rate of interest, it will increases as the rate of interest declinesAccording to ording to classical economics, saving is a function of the rate of interest. The higher the rate of interest, the more money will be saved. Investment is also a function of the rate of interest, it will increases as th s as the rate of interest declines