Math — Classifying Functions

digraph Functions {
  node [shape=box, style=rounded];
  Functions -> Algebraic;
  Functions -> Transcendental;
  Algebraic -> Polynomial;
  Algebraic -> Rational;
  Algebraic -> "Root / radical";
  Polynomial -> Linear;
  Polynomial -> Quadratic;
  Polynomial -> Cubic;
  Transcendental -> Exponential;
  Transcendental -> Logarithmic;
  Transcendental -> Trigonometric;
}