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.
If you want to develop a solid understanding of coordinate geometry, all that is here will plot the pattern of your success. The resources included below revisit some Maths topics needed in your STEM ...
Some results have been hidden because they may be inaccessible to you
Show inaccessible results