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 Graphs to Put Into PowerPoint. Microsoft PowerPoint enables you to create presentations and slide shows. While a wide variety of text-, image- and object-editing features are available ...

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

Removing data from a chart in PowerPoint 2010 is similar to creating one. You choose to edit the chart and the familiar Microsoft Excel window pops up, enabling you to remove columns, rows and cells.