Really Stuck, graphs of functions???

The Question Reads:

draw the graphs of the functions listed over the given range's of x in steps of one unit. from these, estimate the nature of the roots.

(i) y = x(2) + 2x - 6 (Range of x = -5 to +3)

I understand pretty much none of this, i dont know how to draw the graph because i dont know what to plot, or how to calculate the data, in order to plot. I've got no literature, had no worked examples and a useless lecturer who likes to show how clever he is by means of baffling myself and the other 70 students with utter gobledegook.

anyway, enough about the poor quality of my lecturers. can anyone please help, i know its a very basic question but i really just dont know where to start. many thanks ;)