Students need to see the value in the lessons their teacher provide. As students begin to approach driving age, they may start to think about the make, model, color, and features they would want in a car; but do they think about the cost or how that cost depreciates over time? The author used these questions to develop a Desmos activity that would help her ninth graders see how exponential functions can be used in the real world. This activity kept students engaged, was relevant to their lives, and incorporated multiple representations to help students build a conceptual understanding of exponential decay.