Which of the following best represents the average rate at which infants grow in height during the first four years after birth? (2 points)
Select one:
a. 3 inches per month
b. 3 inches per year
c. 3 feet per month
d. 3 feet per year
b seems to be the only reasonable number
To determine the average rate at which infants grow in height during the first four years after birth, we can use the formula:
Average rate of growth = Change in height / Time elapsed
Let's calculate the average rate for each option:
a. 3 inches per month:
The average growth rate would be 3 inches/month x 12 months/year = 36 inches/year.
b. 3 inches per year:
This option matches the time frame we are looking for (four years), so the average growth rate would be 3 inches/year.
c. 3 feet per month:
The average growth rate would be 3 feet/month x 12 months/year = 36 feet/year.
d. 3 feet per year:
This option matches the time frame we are looking for (four years), so the average growth rate would be 3 feet/year.
Based on the calculations, option b, which is 3 inches per year, represents the average rate at which infants grow in height during the first four years after birth.