Graphing a piece-wise defined function in RKward

[Philip (Michael) Dykes]

I am very new to both R and Rkward and am trying to plot the following:

f(x)=    x^2, if x <= 2,
             6-x, if x > 2.

How can I do this in Rkward? Also, I would like the graph (plot) to look 
as much as possible like the graph I was in this book (attached).

Thanks so much.

-MD
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