how to make a xy table for the following greatest integer equation when using -1,-2,0,1,2 to plug into x

Question

f(x)=2[x], g(x)=[2x], f(x)=-[[x]], and
g(x)=[[-x]]

Answer 1

I answered in

http://www.jiskha.com/display.cgi?id=1442879979

You, of course, did not enlighten me on the difference between

[x] and [[x]]