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.

Discover how horizontal integration can grow your business through mergers, acquisitions, and expansions to increase market ...

Amanda Jackson has expertise in personal finance, investing, and social services. She is a library professional, transcriptionist, editor, and fact-checker. A horizontal spread (more commonly known as ...