Wealth and substitution effects explain why the aggregate demand curve has a positive slope

Refer to the scenario above. The future value of the initial deposit after one year is:

A) $300. B) $1,000. C) $1,300. D) $2,300.

In an economic model, an exogenous variable is

A) a stand-in for more complicated variables. B) determined by the model itself. C) determined outside the model. D) a variable that has no effect on the workings of the model.