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.

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

PowerPoint presentations with multiple sequential graphs, such as monthly results each on a separate slide, tax viewers' short-term memory, preventing them from absorbing the results. Beth Lisberg ...