A simple and convenient tool for creating and editing graphs online?

Question

infographics

Good afternoon, Khabrovites!
I ask you, please tell me such a tool - paid or free, which would allow:
1) to create graphs depending on time and display them several times on one page. Graphs, and it would be nice to have a name such that several time-dependent parameters are displayed on one graph, and these parameters could be shown or hidden.
2) you want to store the charts you create on the web - you can use your own hosting, you can use the manufacturer’s hosting, and so that you can access it via the
Internet
4) the ability to change the scale on the chart along the time axis
5) the ability to import and export data
6) (optional) multi-user system - admins and users who only view charts
I would be extremely grateful for your help!

Answer 1

Google Docs can do all this, and doing it in it is quite convenient.

Answer 2

code.google.com/apis/chart/