Hi all, i need some hints in how to start this problem...

Suppose $\displaystyle f(t) = tH(t)$ and $\displaystyle g(t) = t^2H(t)$

a) Sketch the graph of $\displaystyle f(t)$ and $\displaystyle g(t)$ over the interval $\displaystyle 0 \leq t \leq 2$

I can see part of the graph on Wolfram but I'm pretty stuck...