Question

Is the following relation a function?

Answer 1

x y
−1 −2
2 3
3 1
6 −2

Answer 2

no its not a function because the one of ur y values has 2 x values and to be a function every y value should have one x value

Answer 3

only one x value*

Answer 4

k thanks

Answer 5

actually it is a function

Answer 6

why @satellite73

Answer 7

all you have to check is that the first numbers (domain elements) do not repeat

Answer 8

since they are all different, it does represent a function
it makes no difference if the second numbers (range elements) repeat or not

Answer 9

satellite73 its not a function because the y value has -2 twice so its not a function

Answer 10

http://www.purplemath.com/modules/fcns.htm

Answer 11

no, that means it is not a one to one function
the constant function \(f(x)=3\) is a function, for example, even though it sends all numbers to 3

Answer 12

mmm :/

Answer 13

@briszabo carefully read the purple math link you sent,
look particularly at example 2

Answer 14

@Gabylovesyou trust me on this one
for a relation to be function, all that is necessary is that the domain elements do not repeat
so for example you could not have
x y
1 3
2 4
1 2

because in that example 1 repeats

Answer 15

but in your example none of the domain elements (the \(x\) s ) repeat, so it is a function

Answer 16

ik im right because i just took a test and said it wasnt a function and got it right

Answer 17

Part 1: Create a relation of five ordered pairs that is a function. In complete sentences explain why this relation is a function.
Part 2: Create a relation of five ordered pairs that is not a function. In complete sentences explain why this relation is not a function.

ESSAY SUBMISSION
part 1 relations: {(0,1),(55,22),(3,-50),(5, 2),(-3, 9)this relation is a function because the y value only has one x value for each pair.
part 2 relations that aren't a function: {(-1,7) , (1,-7),(1, 7),(33, 7),(32, 7)} its not a function because the y value has more then one x value each.

ESSAY FEEDBACK

Brianna, You have illustrated relations as functions and non functions perfectly. Mrs. Griffiths Grading Specialist

Points earned on this question: 4
heres what my teacher told me

Answer 18

you can repeat y value, period function do repeats,

Answer 19

@briszabo I have that same question!!!!!!! Can you answer it but with different numbers??

Answer 20

it is a function

Answer 21

yes i can

Answer 22

thank you !! @briszabo

Answer 23

anytime

Answer 24

ok everyone just put yes or no! and ill see what ill put

Answer 25

its a function

Answer 26

it's a function

Answer 27

@briszabo so @satellite73 was right??

Answer 28

yes

Answer 29

alright :)

Answer 30

no offence, but mrs griffith grading specialist is an idiot

Answer 31

:) i just asked my teacher

Answer 32

LMAO!!!!! alright can you help me on that question you had now?

Answer 33

not really surprising to me, since many math teachers at the secondary level are less than competent

Answer 34

whoa

Answer 35

yea i sure can

Answer 36

lol!!! thanks @briszabo

Answer 37

@briszabo just because you math teacher is confused, doesn't mean you should be
this line
part 2 relations that aren't a function: {(-1,7) , (1,-7),(1, 7),(33, 7),(32, 7)} its not a function because the y value has more then one x value each.
is incorrect.

the relation is not a function, that is right, but the reasoning is wrong
the reason it is not a function is because there are two ordered pairs, namely (1,-7) and (1,7) with the same first coordinate

it is not because "the y value has more than one x value"

Answer 38

if your teacher really read carefully he or she should know it is incorrect.
my guess is, on the other hand, that he or she was so pleased to get a correct example that they did not bother to read further

Answer 39

ur so rude do talk about my teachers assiasant like that