To animate a line graph in PowerPoint, you need to open the slide, draw the Graph add the labels and then animate the graph as explained here.

We show you how to create a Histogram chart in Microsoft PowerPoint. A Histogram is a graphical representation that shows frequency data.

Start the PowerPoint application and use the "File" menu to open the presentation containing the graph to which you wish to add the callout.

Before you put together another PowerPoint presentation, make sure your pick the right type of chart to clearly communicate the information you want to share. Here's how.