numbers and algebraic expressions
logic, sets, intervals
function and its properties
limits of sequences and functions
derivative and integral of functions
elements of statistics
The Möbius transformation that is rational function of the form: y = ax+b / cx+d where ad-bc ≠ 0 and c ≠ 0. The special case of the Möbius transformation is function given a formula y = k / x, where k ≠ 0. Its graph is hyperbola.