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World 3 · Vectors that change with time · 10 min · PRO

Small steps along a vector field

PRO · Vector Lab

World 3: Vectors that change with time is part of PRO

The first world of Vector Lab is free. PRO opens the other 21 lessons in 6 worlds — simulations, quizzes and all.

  • Close starts can separate
  • A line is a point plus a direction
  • Solve where a line meets a plane
  • No crossing, or infinitely many
  • Two decaying directions
PRO includes
  • All 26 labs — every world, every lesson
  • Practice exams and certificates

$8.33/mo, billed yearly ($99.99) · or $39.99 monthly

Unlock Vector LabTry the free world
← Find a direction that stays on its lineClose starts can separate →

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