Help Graphing :) urgent please help?

i need to graph :graph of the functionF(x)= 2*[x] for the domain -2 <x =or <1


please help graph this for me or reccomend a web site where i can just type that in

Phucuong2014-10-07T20:39:17Z

use www.wolframalpha.com that is your friend in college