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.

How to Make a Line Plot in PowerPoint. If you need a line chart, Microsoft PowerPoint 2010 can help you plot your line graph on any of the slides that make up your presentation.

Learn tips and tricks on how to create impactful and visually appealing dynamic presentations in older, stand-alone versions of PowerPoint.