2.1: Relations & Functions

Question 1

Relation

Answer 1

Set of pairs of input and output values

Question 2

Domain

Answer 2

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

Question 3

Range

Answer 3

Set of all outputs, or y-coordinates of the ordered pairs

Question 4

Mapping Diagram

Answer 4

Links elements of the domain with corresponding elements of the range

Question 5

Function

Answer 5

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

Question 6

Vertical-line test

Answer 6

Used on the graph of a relation to tell whether the relation is a function

Question 7

Function Notation

Answer 7

f(x) is read as “f of x” or “a function f of x.” f(x) does not mean “f times x.”