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 ...

Um, given two lines in space, intersecting and perpendicular, there are an infinite number of solutions. (The one line can be at any orientation along the axis of the first line).<BR><BR>With the ...

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.