the logic behind graphing

since a large part of my job has to do with the presentation of data (i.e. making boring stuff look pretty), i'm always searching for new ways to make my powerpoints look more spiffy. i like the look and feel of graphs because A) they take a lot of data and compress it into a very small setting and B) they incorporate COLOR (even if it's just the random colors excel chooses for me...). i'm pretty good at determining whether a graph looks good after the fact, just like i can tell you if a sentence is correct after you've written it or paint colors go together well after they're up on the wall. but unlike these 2 comparisons, i really never had an idea why a certain graph would look better than others. i kind of just close my eyes and click on one...

until TODAY, that is. i decided to do some research on why certain graphs are better than others and came across this tutorial. i think it's for high schoolers, or maybe even kids in junior high. but i found its very basic instructions refreshing and easy to grasp. i also feel like i've probably learned this before at some point in my life. oh, well! it's never too late to learn it again!