As many of you know you can create charts from within Google Sheets but not Google Docs.
With the Charts Add On all that changes. You can select a Google Sheet, highlight columns, and insert a chart of your choosing into Google Docs.
Charts allows you to choose between a bar, pie, or line graph. Something to keep in mind, is the first row of the columns you select must have title information or be empty. If not, the first row is not included in the graph.