Parent functions

f(x) = c

constant function

f(x) = x

Identity function

f(x) = x²

Quadratic function

f(x) = x³

cubic function

f(x) = root x

Square root function

f(x) = 1/x

Reciprocal function

f(x) = |x|

Absolute value function

f(x) = [[x]]

Greatest integer function