2.1 Relations & Functions

Question 1

Relation

Answer 1

A set of pairs of input and output values.

Question 2

Domain

Answer 2

A relation is the set of all inputs, or x-coordinates of the ordered pairs.

Question 3

Range

Answer 3

A relation is the set of all outputs, or y-coordinates of the ordered pairs.

Question 4

Mapping Diagram

Answer 4

Which links elements of the domain with corresponding elements of the range in another.

Question 5

Function

Answer 5

Is a relation in which each element of the domain is paired exactly on element in the range.

Question 6

Vertical-line test

Answer 6

On the graph of a relation to tell whether the relation is a function.

Question 7

Function notation

Answer 7

f(x) as “f of x” or “a function f of x.”