Question

Ericka observed the total variation in the water level over 6.2 years to be -13.64 mm. She compared this to the
average annual trend, which shows the water level rising 1.8 mm/year. Remember, she used 6.2 years as her
time period. What is the difference between how much average water levels rose and how much the water level
fell in the part of the river she observed?
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Answer 1

Given : Ericka observed the total variation in the water level over 6.2 years to be -13.64 mm. She compared this to the

average annual trend, which shows the water level rising 1.8 mm/year.

To Find : What is the difference between how much average water levels rose and how much the water level  fell in the part of the river she observed

Solution:

the total variation in the water level over 6.2 years to be -13.64 mm.

- sign indicates fall in level of Water

Average Fall of Water per year  = 13.64/6.2 = 2.2 mm per year

= - 2.2 mm Water level rise

average annual trend, which shows the water level rising 1.8 mm/year.

the difference between how much average water levels rose and how much the water level  fell in the part of the river she observed

= 1.8 - (-.2.2)

= 4mm

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Answer 2

Answer:

24.8

Step-by-step explanation:

I just got it wrong because of the other person who answered. And it said this was the correct answer.