relation
set of pairs of input and output values
Domain
set of all inputs or x coordinates of the ordered pairs
range
Set of all outputs or y coordinates of the ordered pairs.
Mapping diagram
links elements of the domain with corresponding of the range.
Function
is a relation in which each element of the domain is paired with exactly one element in the range.
Vertical line test
on the graph of a relation to tell whether the relation is a function
Function Notation
f(x) as ‘f of x’ note that f(x) does not mean f times x