creating graphs in wolfram alpha

Question

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?

Answer 1

Try out Desmos.

Typing $y=\max \left(x-40,0\right)$ works perfectly.

Here's a link to this graph:

Answer 2

Wolfram|Alpha works for me if you specify the bounds for $x$:

» plot max(x - 40, 0) from x = -20 to 60