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This activity explores the use of functions to model the amount of caffeine remaining in the body after consuming coffee or tea. It investigates different methods to find the parameters of the functions and compares the effectiveness of different models in fitting the data.
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Nuffield Free-Standing Mathematics Activity Cup of coffee
Cup of coffee How long does the buzz from caffeinated drinks last?
Cup of coffee The amount of caffeine (mg) remaining in the body after t hours is measured from the time the caffeine level reached its peak value
Caffeine remaining for a non-smoking adult 140 120 100 Amount of caffeine (mg) 80 Coffee Tea 60 40 20 0 5 10 15 20 25 Time (hours) Which functions could be used to model these data sets? How could you find the parameters?
Cup of coffee • Reflect on your work • What types of functions did you use to model the data? • Which method of finding parameters did you use?Do you think it was the most effective? • How well did your models fit the data? • Compare your models with those found by other students. Which model gave the best fit?