2.1 - Relations and functions

Question 1

Relation

Answer 1

a set of pairs of input and output values

Question 2

Domain

Answer 2

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

Question 3

range

Answer 3

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

Question 4

mapping diagram

Answer 4

another way to show a relation

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

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”