Does a salesperson use line graphs to show their sales in.. 6 months?
They could use line graphs or bar graphs or pie charts. It all depends on how he/she wants to demonstrate their sales.
http://www.google.com/search?q=line+graphs&ie=utf-8&oe=utf-8&aq=t&rls=org.mozilla:en-US:official&client=firefox-a
http://www.google.com/search?q=bar+graphs&ie=utf-8&oe=utf-8&aq=t&rls=org.mozilla:en-US:official&client=firefox-a
http://www.google.com/search?q=pie+charts&ie=utf-8&oe=utf-8&aq=t&rls=org.mozilla:en-US:official&client=firefox-a