Consider the Simplest Macroeconomic Model, with a Closed Economy and No

Multiple Choice

Consider the simplest macroeconomic model, with a closed economy and no government. If we assume that desired investment is autonomous with respect to national income, then the investment function (which graphs desired investment against actual national income) will be

A) negatively sloped.
B) vertical.
C) positively sloped and relatively steep.
D) horizontal.
E) positively sloped and relatively flat.