Given:
Over the past 4 years, Grandpa Ernie's height decreased by a total of 2.4 cm.
It decreased by the same amount each year.
To find:
The change in Grandpa Ernie's height each year.
Solution:
Total change in Grandpa Ernie's height in past 4 years = -2.4 cm
Here, negative sign represents the decrease in height.
It decreased by the same amount each year.
So, change in each year is
[tex]\text{Change each year}=\dfrac{\text{Total change}}{\text{Number of years}}[/tex]
[tex]\text{Change each year}=\dfrac{-2.4}{4}[/tex]
[tex]\text{Change each year}=-0.6[/tex]
Therefore, the change in Grandpa Ernie's height each year is -0.6 cm. It means, the Grandpa Ernie's height decreased by 0.6 cm each year.
