Higher - The gradients of two perpendicular lines will always multiply to make –1. Make sure you are familiar with finding the equation of a line and calculating gradient to understand equations of ...

If you live in a big city, this scenario is all too familiar: Traffic is bad. You're late for work. And, of course, the parking garage is now full. So you're forced to parallel park on the street. You ...

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.