The graph shows the relation between the age and height of boys and girls with a comparison between both of them.
From the above graph, we conclude that initially boys grow faster than girls from 0-8 years.
At reaching puberty, both has a sudden rise in their height, though the girls grow faster than boys from 8-16 years.
Both reach their maximum height at the age of 20. Here the boys show a greater increase in height than girls.
Now, growth in both of them comes to a halt, upon reaching the end of adolescence as the hormonal changes and their secretions had become stable at this point.