Andy has measured his height every three months since he was 9 years old. Below are his measurements in meters.

a. Find the first differences for Andy's heights and make a scatter plot of points in the form (age, D1). Remember to shorten the list of ages to match D1. Describe the pattern you see.
b. Repeat your process from 8a until the differences are nearly constant and show no pattern.
c. What type of model will fit these data? Why?
d. Define variables and find a model. For what domain values do you think this model is reasonable?

Age (yr)Height (Age (yr) Height (m) 1.14 1.21 1.27 1.31 1.33 10.75 1.34 1.35 1.35 9.5 9.75 10 10.25 10.5 11.5 1.35 11.75 1.35 12 1.36 1.39 1.47 12.25 1.37 12.5 12.75 1.42 13 11.25 13.251.54