functions and relations

domain

100

What is the domain?

(8,3)(4,6)(1,3)(9,0)

8,4,1,9

200

define Domaine 

the x values 

300

find the Domain

X             Y

1             4

3             6

5             8

7             0

     the domain is 

1,3,5,7

400

what values are in the domain of 

y= x + 2

all real numbers 

500

what is the domain of a graph

all x values on the graph

function

100

what is a function?

a relation where each input has only one output.

200

is {(1,2),(2,3),(1,4)} a function?

No.

300

does a vertical line test determine if a graph is a function?

yes.

400

why is {(3,1),(3,5)} not a function?

one input has two outputs.

500

true or false: Every function is a relation 

True

range

100

what is the range?

the set of all y values 

200

find the range:  {(2,5),(7,1)(4,9)}

{(5,1,9)}

300

what is the range of y = x^2

all numbers greater than or equal to 0.

400

what part of a graph shows the range?

the y values 

500

can the range have repeated numbers?

yes

relation

100

what is a relation?

a set of ordered pairs 

200

are all relations functions 

No

300

give an example of a relation that is not a function 

{(1,2),(1,5)}

400

ordered pairs are written in what form?

(x,y)

500

true or false: A graph can be a relation and not a function

True