Function
A relation in which each input had exactly one output
Domain
The set of all possible input values (x-values) for which the function is defined
Range
The set of all possible output values (y-values) of a function
One-to-one function
A function in which no two different inputs have the same output
Even/Odd functions
An even function satisfies f(-x)=f(x); an odd function satisfies f(-x)=-f(x)
Piecewise function
Defined by different formulae on different parts of its domain
Composite function
(fog)(x)=f(g(x))
Inverse function
For an intvertible function f, the function f^-1 such that f(f^-1(x))=x and f^-1(f(x))=x
Degree
An expression using variables and integer exponents, involving +, -, x
Leading coefficient
The coefficient of the highest degree term
Horizontal asymtope
The set of possible output (y) values
Polynomial
The set of all possible input (x) values
Vertical asymptope
A line y=b that the graph approaches as x -> +infinity
Zero/Root
A value of x making f(x)=0
End behavior
A relation with exactly one output for every input
