Exponential decay basics are spelled out in the context of car values. Guided notes offer a detailed explanation of how exponential decay works, then students practice the concept through word problems finding current and initial amounts. This resource is used in 2 of my units but modified slightly to be appropriate for each unit. You will receive both versions. A simpler, more direct, one-page version is provided for use in the Car Online Tools unit and takes about 20 minutes. A second two-p