You can add a chart or graph to any diagram type, but if you just want to create a graph by itself, start with the Blank template under Popular.
Next, go to the Insert tab and click on Graph.
You'll be able to choose from a variety of chart types from line chart to pie chart and bar charts.
Once you selected the type of chart you want to generate, you'll be asked to import a data file.
Depending on the type of chart you're making your data should be formatted a specific way.
If you're making a bar chart or line chart use this formatting:
If you're making a pie chart, use this:
Your imported data will look like a perfectly formatted chart like this pie chart:
Or this bar chart:
To edit, your chart, you can double-click it or click Graph again in the Insert tab and choose Edit Graph.
Here, you can adjust where your legend appears, how the title is displayed and even switch between chart types.