Question

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

Answer 1

Answer:

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

Step-by-step 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:

$=\frac{3}{4}+(-\frac{9}{4})+(-\frac{11}{4})+\frac{5}{4}\\=\frac{3}{4}-\frac{9}{4}-\frac{11}{4}+\frac{5}{4}\\=\frac{3-9-11+5}{4}\\=\frac{-12}{4}\\=-3$

Total number of values is 4

So,

$Average = \frac{Sum}{Values}\\= \frac{-3}{4}$

Hence,

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