Reasoning: A polyhedron can have 30 edges. If this polyhedron has 120 it has 4 times the “other” one. If it has 30 edges it will have 20 vertices, meaning 20*4=80 vertices
J j=agv where a is a constant of proportionality. j=1 when g=4 and v=5 1=a*4*5 1=20a a=1/20 a= 0.05 j=0.05gv When g=10 and v=9, j=0.05*10*9 j=0.5*9 j=4.5