To insert a chart or graph into PowerPoint, follow the steps below:

1. Open the slide where you want to insert your chart or graph
2. Select the Insert tab on the ribbon menu
3. In the Illustrations group, select Chart
4. Choose the type of chart that best suits your data
5. Input your data into the chart options
6. Select the Design tab on the ribbon menu to customize your graph
7. Make sure to add appropriate labels, titles, and legends to your chart or graph