Explaining How to Compare Water Levels Ericka decided to compare her observation to the average annual trend, which shows the wa
ter rising 1.8 mm/year. Remember, she used 6.2 years as her time period. Explain how she would calculate the difference between how much water levels rose on average and how much the water level fell in the part of the river she observed.
To compute the average rise in water levels, she will need to multiply the annual increase of 1.8 by the duration of 6.2 years, resulting in 11.16. Next, to determine the difference between average water level rise and the observed decline of -13.64, she will subtract -13.64 from 11.16.
