Answer : Google charts is a simple way to use display charts in our web page just by passing values through query string(i.e passing values through url ex: www.website.com/page?value1=1&value2=2)
pie chart :http://chart.apis.google.com/chart?cht=p&chs=410x250&chdl=Walklists%7CPhone+Bank%7CDirect+Mail%7CEmail&chco=CB4B4B|EDC240|4DA74D|9440ED&chp=0.436326388889&chtt=Current+Activities&chts=666666,20&chl=20%|20% |50%|10%&chd=t:20,20,50,1
values highlighted in yellow are the values you have to provide
http://chart.apis.google.com/chart?cht=bvs&chs=410x250&chco=4DA74D&chxt=x,y
&chxl=0:|Walklist%201|Walklist%202&chbh=a&chtt=%%20Walklist%20Completion&chts=666666,
20&chd=t:50,66,0
to change the chart style and type there are few modification you have to do with the url :
they are :
For More info : https://developers.google.com/chart/image/docs/gallery/chart_gall

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