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.

Charts are a great way to visualize large sets of data. Here's how to add a graph on Google Docs and edit it in Google Sheets.

How to draw a line in Word using the Shapes menu If you’d like your line to be a particular length, you can draw it in Word using an option in the Shapes menu.