Oh my, what a morning!

I was about to start to cry. It's like this math is a "secret".

So, a little background...I'm a mom trying to help her dyslexic and very shy son figure out how to do some of his Algebra II homework.

I can't show you what I've tried, because I haven't tried anything. The problems look like this: y = [[2x]] or y = 2 [[x]].

It's a function to graph. I know how to graph functions, but I don't know what that double bracket thing means. In the book it has the problems and then it says "Page so and so"...I looked on that page and NOTHING tells me what this double bracket thing means.

So, please tell me what to do here. If you don't want to "give me the answer", fine. Just walk me through a similar problem. I just need clear steps to walk my son through it.

Thanks.

Kristine