Pour v=20, f(v)= 20² /155 = 400/155
v=40, f(v)=40² /155 = 1 600/155 = 10
v=60, f(v)=60² /155 = 3 000/155 = 20
v=80, f(v)=80² /155 = 6 400/155 = 41
v=100, f(v)=100² / 155 = 10 000/155 = 64
v=120, f(v)=120² /155 = 14 400/155 = 93
v=140, f(v)=140² /155 = 19 600/155 = 126
v=160, f(v)=160² / 155 = 25 600/155 = 165