Answer:
+4
Step-by-step explanation:
The numbers above are all odd number
The arithmetic progression is the addition of +4
7+4=11
11+4=15
15+4=19
Its not linear because growth rates vary with age, gender also plays a role in the change
F(n)=f(n+1)=f(n+1)-5 because in the formula you are subtractinng