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.