Human beings are highly visual learners. It's much easier for our brains to remember a strong, unique image than a series of facts and figures. PowerPoint is a great, easy-to-use program for creating dozens of different types of graphs and charts. Remember that the simpler and bigger the graph, the better. For example, if you want to drive home the point that Windows PCs control a large majority of the home computer market, show a pie chart with a huge chunk of the pie filled in with red and the word "PC." No matter how many stats you quote, this image will get the message home faster and will stick with the audience longer.
In fact, the purely visual portion of your PowerPoint presentation will be chiefly responsible for about 55 percent of the impact you have on your audience, compared with 38 percent in regards to the things you say, and 7 percent of the text you quote on each slide [source: Price].