Answer:
G(x) = 2 + 4n is the growth function.
Step-by-step explanation:
The initial length of the tree planted in backyard = 2 ft
The average growth of the tree each year = 4 ft
Let n be the number of years taken into account any moment.
Hence the growth function G(x) = Initial height + Growth each year
or, G(x) = 2 + 4n : here n = number of years.