To create a chart, go to Tools at the left menu panel. Click the Charts icon; a pop-up window will appear.
Each element indicated in the above screenshot, from left to right, is:
1) A list of available chart types. You may click each of them to see which chart best visualizes your data.
2) A preview of the chart when it is inserted into the visual. You cannot edit anything on the chart preview.
3) A spreadsheet for inserting your data Click here for further reading on importing data.
Within the data tabs are two buttons - Sample Data 1 and Sample Data 2. These are dummy data points to help you preview the different visualizations.
Insert your data, name the chart and axises if desired, and selected the correct visualization chart.
4) When you're satisfied with the chart preview, click to Insert Chart.