The table below shows the data on likely heights of boys and girls as they grow in age. Draw graphs showing height and age for both boys and girls on the same graph paper. What conclusions can be drawn from these graphs?
Age (Years) 
Height (cm) 

Boys 
Girls 

0 
53 
53 
4 
96 
92 
8 
114 
110 
12 
129 
133 
16 
150 
150 
20 
173 
165 
Answer
The graph shows the relation between age and height of both boys and girls.
We note that during 812 years, girls experience a sudden growth and have more height as compared to boys. This is because puberty occurs earlier in girls(1012 years), so they grow rapidly during this phase.
During 1216 years,boys experience sudden grown and their height becomes the same as girls.This is because puberty occurs later in boys (1213 years) and they grow rapidly during puberty
And, in later years, growth in both boys and girls become stable