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The amounts below show the change (measured in feet) in water level over four months. What is the average monthly change in water level?

3/4, -9/4, -11/4, 5/4

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Answer:

The average change in water level is: -3/4

Explanation:

The average is calculated by adding up all the values and then dividing the sum by total number of values.

Given values are:

3/4, -9/4, -11/4, 5/4

The sum of values will be:


=(3)/(4)+(-(9)/(4))+(-(11)/(4))+(5)/(4)\\=(3)/(4)-(9)/(4)-(11)/(4)+(5)/(4)\\=(3-9-11+5)/(4)\\=(-12)/(4)\\=-3

Total number of values is 4

So,


Average = (Sum)/(Values)\\= (-3)/(4)

Hence,

The average change in water level is: -3/4

User Kamlesh Meghwal
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