Solve for n < energy level?

Question

Energy Levels In Hydrogen Atom?
So the formula is - E(n)=218.0x10^-20/n^2
E(n) give the energy level of energy level of the H atom in Joules.
Note: We are keeping all number relative to 10^-20 to make graphing

Cacculate if n= 1,2,3

* I caculate it, but I dont' know how to graph it. The chart is like this http://www.phys.uoa.gr/phononics/images/...
Where each square is represent as 5x10^-20.
Please help mee. This is duee tomorrow.
Show me how to graph it, and can u cacualte it, so I can check my answer.

Answer 1

Using a scale factor of 5*10^-20,
E(1) = -218/1/5 = -43.6 ≈ -43
E(2) = -218/4/5 = -10.9 ≈ -11
E(3) = -218/9/5 = -4.84 ≈ -5

E1 = (1,-43)
E2 = (2,-11)
E3 = (3,-5)