Suppose the federal reserve decreases the money supply. i’m at least four sentences explain the effects of this action on interest rates, consumption, investments and gross domestic product

The value of the dollar would go down even more which raises the price of everything. Google the "National Debt Clock and you will see that the United States of America has gotten in huge HUMONGOUS DEBT and still getting deeper in debt by the second that the money will fail and so will the government. The USSR fell apart and it sure looks like the USA will also. We borrow money from our enemies and they own stock and property in the USA. Those "highly educated" people in Congress, the White House and the rest of Washington have no clue as how to fix this mess. Now one senator wants to spend more billions of dollars by bombing Syria which will just install possibly a more radical Islamic government there that sees the United States as despicable "Infidels" that must convert to Islam or die.

An independent variable that the student controls during the experiment. (i'm not 100% sure this is correct, so i'm sorry if it's wrong)

Hey, i dont see it either