Explore for yourself how a vector in 2D plane can always be expressed as a sum of scalar multiples of two other non parallel vectors in the plane.[br][br]A good reference on introduction to vectors [br][url=https://nrich.maths.org/2390]An Introduction to Vectors (GCSE Stage: 4 and 5), Toni Beardon, June 2004,February 2011, NRICH Article[/url]