XY-plot tutorial outdated?

Hi,

I'm new to Mathcad, so i'm following some tutorials. However, I'm getting stuck with this basic one:

https://learningconnector.ptc.com/content/tut-162/plotting-data?isNew=false

I'm reproducing the exact same input in Mathcad 6.0, but it's not working for me. It's telling me that x needs to be a scalar or a matrix. See the attached screenshot.

Please note that it does work when I evaluate the x=1..10 function. However, that creates a messy vector in my sheet, which I would like to hide... Can I get the plot to work without evaluating this function?