The value in an exponential b Decay Factor decay function. Key Concept: Exponential Decay Model a fixed percentage during a specific amount of time Used when “real-life” quantities decrease by ending Amount y: beginning Amount a: Rate of decrease in decimal form r: Time in years t: Show: Graph Ex 1: Graph Ex 2: Graph Ex 3: Graph Ex 4: A new car costs $25,000. The value of the car decreases by 15% each year. Ex 5: Write an exponential decay model giving the value (in dollars) after years. y t car’s Estimate the value after 4 years. Graph the model. Closure:
Decay Factor The b value in an exponential decay function. Key Concept: Exponential Decay Model Used when “real-life” quantities decrease by a fixed percentage during a specific amount of time y: ending Amount a: beginning Amount r: Rate of decrease in decimal form t: Time in years Show: Ex 1: Graph Ex 2: Graph Ex 3: Graph Ex 4: Graph Ex 5: A new car costs $25,000. The value of the car decreases by 15% each year. Write an exponential decay model giving the car’s value y (in dollars) after t years. Estimate the value after 4 years. Graph the model. Closure:
student_notes_-_alg_ii_-_chapter_4_-_key_-_larson_cc_(1).docx