2.1:Relations&Functions

Question 1

Relation

Answer 1

A set of pairs of input and output values

Question 2

Domain (of a relation)

Answer 2

The set of all inputs, or x-coordinates of the ordered pairs

Question 3

Range (of a relation)

Answer 3

The set of all outputs, or y-coordinates of the ordered pairs

Question 4

Mapping Diagram

Answer 4

Another way to show a relation is to use a mapping diagram, which links elements of the domain with corresponding elements of the range

Question 5

Function

Answer 5

A relation in which each element of the domain is paired with exactly one element in the range

Question 6

Vertical- line test

Answer 6

You can use the vertical- line test 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”