2.1 Relations and Functions

Question 1

relation

Answer 1

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

a way to show a relation

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

tells whether the relation is a function

Question 7

function notation

Answer 7

” f of x”