Question

graph y=x^2

Answer 1

http://www.wolframalpha.com/input/?i=y%3Dx^2

Answer 2

This is a graph of a parabola opening upwards, with vertex at (0, 0).

Answer 3

http://www.google.gr/imgres?q=y+x%2B2+graph&um=1&hl=el&client=ubuntu&sa=N&tbo=d&channel=cs&biw=1024&bih=464&tbm=isch&tbnid=Uz_o7PVmE2xc2M:&imgrefurl=http://www.bbc.co.uk/schools/gcsebitesize/maths/algebra/transformationhirev1.shtml&docid=F5Tf4a7ob-MIfM&imgurl=http://www.bbc.co.uk/schools/gcsebitesize/maths/images/graph_24.gif&w=546&h=314&ei=o7usULmMNsmSswbJt4CYDg&zoom=1&iact=hc&vpx=4&vpy=158&dur=1187&hovh=170&hovw=296&tx=136&ty=88&sig=100164351996734709576&page=1&tbnh=128&tbnw=221&start=0&ndsp=11&ved=1t:429,r:0,s:0,i:82

Answer 4

use what gorica said wolframalpha works good

Answer 5

if you have smartphone with android, you can download "mathlab" application. it contains every type of graph