I don't know about you, but I'm a whole lot better at real estate than I am at Excel Spreadsheets and making fancy graphs.
Still, a picture speaks 1,000 words and graphs like this one are a snap to do.
Just Google "Create A Graph" and it will take you HERE.
I could have just given you the link, but this way all you have to remember if you need to make a graph weeks from now is to Google "Create A Graph". Pretty simple...no? (We all stole that no? thing from Kevin Tomlinson.)
The rest is Child's Play. In fact the site is meant for children. I use pie charts like this:
You don't have to be a geeky boy to create charts and graphs for your blog. Any kid can do it, and so can you.