How To Understand Span (Linear Algebra)

Photo by Lucas Benjamin on Unsplash

Our eyes see color using only three types of cone cells — which take in red, green, and blue light — and yet from those three types we can see millions of colors. Beyond being a nice, efficient biological feature, this illustrates an important concept in linear algebra: the span. To explain span intuitively, I’ll give you an analogy to painting that I’ve used in linear algebra tutoring sessions.