Linear Algebra · Advanced · 5 min

When vectors make a plane

Two vectors can build a plane only when they point in genuinely different directions.

WHAT HAPPENS IF…Make two nonzero vectors that span only a line.
Interactive exploration
Preparing your experiment…

Connect the picture to the ideaau+bv=0⇒a=b=0a\mathbf u+b\mathbf v=0\Rightarrow a=b=0

For two vectors in the plane, nonzero determinant means the only zero-producing combination is the trivial one. If the determinant is zero, the columns are dependent and span at most a line.

A detail that matters

Two different vectors can still be linearly dependent.

Keep the connection going

One idea leads to another.

More linear algebra ↗