The water around a Florida power plant in the winter averages 22.5 °C. Isaiah measured the
water temperature, t, every week for five weeks and recorded the difference between each
measured temperature and 22.5 °C by calculating t – 22.5.
Week Temperature Difference from 22.5 °C
Week 1 2.5
Week 2 - 4.1
Week 3 - 0.5
Week 4 1.0
Week 5 - 3.4
What is the average of the actual water temperatures taken during the five weeks? Explain
how you found your answer.