Graph of a quadratic using the Google Image Chart API

Graph of a quadratic using 1xy graph:
https://chart.googleapis.com/chart?cht=lxy&chs=250x250&chd=t:-1|-1&chfd=0,x,-10,10,.1,x|1,y,-10,10,.1,y^2&chds=-10,10&chxr=0,-10,10|1,-10,10&chxt=x,y&chg=5,5,1