Graphing MLE as a function of variance with some fixed $n$.

Question

I am given an maximum likelihood estimator of $\sigma ^{2}$ which is $MLE=\frac{2\sigma ^{4}}{n-1}$. When $n=10$, I have to graph this formula as a function of $\sigma ^{2}$.

Does that mean I create a sequence of $\sigma ^{2}$ values?

variance = seq(1, 100, 0.1)

Then create a function for this formula?

mle = function(variance)
{
formula = 2*variance^{2}/9
}

Is this the correct function though?