Horizontal lines run left to right, parallel to the horizon, with slope 0 and equation y = k. Vertical lines run top to bottom, perpendicular to the horizon, with undefined slope and equation x = k.

It’s a common belief that if you want to appear slimmer than you actually are, you should wear clothes with vertical stripes. The classical pinstriped business suit would be an example of this sort of ...

A great way to make your Word document easier to read and more visually appealing is to separate sections in the document by inserting a graphical horizontal line. Word provides a number of attractive ...