# creating graphs in wolfram alpha

I am trying to plot the function $$\max(x-40,0)$$ in Wolfram|Alpha, but I can't figure out how.

What Wolfram|Alpha query URL should I use to produce this graph? Or, what similar online program could I use to produce this graph?

Typing $y=\max \left(x-40,0\right)$ works perfectly.
Wolfram|Alpha works for me if you specify the bounds for $x$: