• Position vector
  The blue vector represents a position in space
• Line with 2 points
  Line in space determined by two points
• Position and direction vectors for a line
  Blue position vector and red direction vector
• Animation of parameterized line (Quicktime format)
  Illustrates sum of position and scalar multiples of direction
• Vector form of line in the plane
  This Java applet from Japan illustrates how a line (in the plane) can be described using a position vector and a direction vector.