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.

Lines are everywhere in graphic design. The border of an image, the roads on a map and even the lines that make up a smiley-face image. To work as a designer you need to understand the five types 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 ...

A worksheet on identifying the equation of a line that is parallel or perpendicular to the axes or a line that passes through the origin (0,0), given its graph. In the latter case the students have to ...