The head circumference of an infant is measured and recorded to track the infant's growth and development.
Nathan's head circumferences from age 3 months
3
through 12 months are recorded in the table below.
Use the table for Items 23-27
Age (months)
3
4.
5
6
Head
Circumference (cm)
43
44
44.7
45.2
45.8
46.3
7
8
47.1
9
10
11
12
47.6
48.0
48.3
23. Use a graphing calculator to find an exponential
function to approximate Nathan's head