Pediatricians will measure and track the growth of an infant’s weight and length to be sure the baby is thriving and growing properly. The growth of baby girl Grace is displayed in the data table below.
Growth Chart for Baby Girl Grace
(4–30 Months)
Months 4 6 8 10 12 14 16 18 20 22 24 26 28 30
Length (inches) 20 21.5 23 24.5 26 27.5 29 30.5 32 33.5 35 36.5 38 39.5

Use the data in the table to find the rate of change in the length of baby girl Grace.