A graph plots saving versus disposable income. A rising line labeled S is graphed.The horizontal axis is labeled disposable income. Points B and D are marked on the horizontal axis from left to right. The vertical axis is labeled saving. Point A is marked on the vertical axis below the origin. A rising line labeled S begins at (0, A), crosses the horizontal axis at point B, goes up and to the right and ends at the top-right. Point C is marked on the rising line near the end point. A vertical dashed line from point C ends at point D. The saving schedule shown in the diagram would shift downward if, Other things equal, a decrease in the real interest rate will Multiple Choice move the economy upward along its existing investment-demand curve. move the economy downward along its existing investment-demand curve. shift the investment-demand curve to the right. shift the investment-demand curve to the left