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As a mathematics teacher, I teach exponential growth equations to algebra students. Compound interest earned on principle left in the account results in an exponential growth curve. The earlier a person invests and adds to the principle, the more quickly the curve approaches infinity. A fun question is: "How much money do you have to invest now at x% interest to be a millionaire when you turn 65?"
On the flip side, debt has the opposite affect on our ability to become financially independent. Financial literacy has a lot of mathematical applications in the classroom.
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