I believe that every single chart used within the documentation is a real, live chart. Right clicking on the Average Electric Usage image yields the following URL:
https://chart.googleapis.com/chart?cht=lc&chs=350x100&chd=t:100|0,100&chds=0,100,0,100&chco=00000000&chma=10,10,28,21&chxt=x,x&chxs=0,000000,0,0,t&chxtc=0,0&chf=c,lg,0,00d10f,0,4ed000,0.1,c8d500,0.2,f07f00,0.567,d03000,0.75,ad0000,1&chxs=0,,9,0,t,000000|1,,9,0,t,000000&chxl=0:|1-bedroom|2-bedroom|2-bedroom|3-bedroom|4-bedroom|1:|apartment|apartment|house|house|house&chxp=0,8,30,50,70,90|1,8,30,50,70,90&chm=V,FFFFFF,1,0.2,2|V,FFFFFF,1,0.4,2|V,FFFFFF,1,0.6,2|V,FFFFFF,1,0.8,2|@fYour+Usage:15kw,777777,1,.1:.6,11,1&chma=0,0,50&chtt=Average+Electric+Usage Have fun, Keith -- You received this message because you are subscribed to the Google Groups "Google Chart API" group. To post to this group, send email to google-chart-api@googlegroups.com. To unsubscribe from this group, send email to google-chart-api+unsubscr...@googlegroups.com. For more options, visit this group at http://groups.google.com/group/google-chart-api?hl=en.