As part of our junior level Algebra and Trigonometry course, students have been exploring exponential functions and financial decisions. The first week of December students spent class time learning about compounded interest and how this applies to major purchases and loans. Many of our students recently got their driver’s licenses and are interested in purchasing a car in the near future. To help prepare them for this real world event, students used information from kellybluebook.com to research the cost of financing a used vehicle. Each student calculated the compounded interest on several car loans to help supplement their knowledge of smart spending. Student ultimately selected a car and a loan that best fit their budget and briefly presented their findings to the class. Students also spent time calculating the outcomes of certain investments and how much you really pay when you make a purchase on a credit card.