HL Vector Equation of a line 2D & 3D - 3.11
Vectors are humanities response to the question: how can we define and measure movement? All 2D movement can be defined by breaking that movement down into a left/right (x or i are common notation for this dimension) and up/down (y or j) movement. Position vectors (any point on the line, not just the y-intercept), written vertically, replace the y-intercept and Movement vectors replaced, and are always the reciprocal...