Question

PLEASE HELPPP WILL MEDALLL decide whether the relation is a function and justify your answer then state the domain and range.

Answer 1

(2,-9) (2,-2) (6,8) (8,1) (11,-7)

Answer 2

@marcelie @mathmate

Answer 3

first off its NOT a function right

Answer 4

This is a case of a relation defined by points (5 points in all).

Answer 5

Yes, it is a relation, not a function, as you have well said.

Answer 6

Do you know where to look for the set of numbers that make up the domain, the range?

Answer 7

its not a function because the domain number repeat would that be the answer

Answer 8

range is from lowest to highest only y values

domain is read from left to right ( x's only )

Answer 9

what would I write for the justify answer.

Answer 10

for the function part I just write yes or no then explain why

Answer 11

The fact that the relation is not a function is not the only answer.
You need to present two sets of numbers, one for the domain, one for the range.
As @marcelie said, you extract these numbers from each of the points, the x-coordinates for the domain, the y-coordinates for the range.
A set is shown as, for example, {2,4,6,9}, or {1,2,6,7}
You need to select all the x-values from all of the points to make the domain (set).
Note the use of braces {}.
THere is a trap: sets do not have repeated elements.
Most mathematicians do not consider {1,2,2,3} a set, because of the repeated "2".
You put {1,2,3} instead.

Answer 12

I know but theres 2 part to this question

Answer 13

@Photon336

Answer 14

@arabpride this isn't a function right

Answer 15

Yeah basically every x value must have one and only one y value for it to be a function

Answer 16

now I have to put the range and domain in order

Answer 17

I am referring to the second part. The first (function or not has been settled), the justification is what you have said.
"its not a function because the domain number repeat" would be accepted, if I were the teacher.

Answer 18

okay now I have to put them in order lets start with the domain

Answer 19

@CandyCove I just need the domain and range in the correct order

Answer 20

alright, I'm ready.

Answer 21

the domain would be -8,-8,-1,4,7

Answer 22

right

Answer 23

Right, see how the x-value 2 repeats? That’s the indication that this set of points is \(not~a~function\).

Answer 24

is my domain in the correct order

Answer 25

Are we working with
(2,-9) (2,-2) (6,8) (8,1) (11,-7)

or you have a different relation?

Answer 26

Yes, but repeating the "-8" is unnecessary.

Answer 27

@roxyyy
Are we working with (2,-9) (2,-2) (6,8) (8,1) (11,-7)
or you have a different relation?

Answer 28

yes

Answer 29

yes to what? lol

Answer 30

Could you kindly explain how you got {-8,-8,-1,4,7} as the domain?
Note: remember to put the list of numbers in braces, as I mentioned earlier.

Answer 31

my range is -2,-7,1,8

Answer 32

braces, braces!

Answer 33

@roxyyy
Are we still working with (2,-9) (2,-2) (6,8) (8,1) (11,-7) or you have a different relation?
Could you kindly explain how you got {-2,-7,1,8} as the domain? Note: remember to put the list of numbers in braces, as I mentioned earlier.

Answer 34

MY TEACHER DOESNT CARE

Answer 35

I thought you said your teacher was picky? o.0

Answer 36

or did you say he/she wasn't?

Answer 37

@roxyyy
Goes with you. Bad habits are hard to get rid of.

Answer 38

she is with the explaining part

Answer 39

Okay, well that's easy then, the set of points is NOT a function because the x-value of 2 repeats.
Easy-peasy

Answer 40

you there

Answer 41

@roxyyy :
You have a set of ordered pairs. Let's call them (x,y), so the first value in a pair is 'x' and the second value is 'y'
Domain: the _set_ of all x-coordinates (first values)
Range: the _set_ of all y-coordinates (second values)

So start by writing down all the x values. Are there any duplicates? If, like your other helpers said, the same x-value appears more than once, it cannot be a function (because a function gives one y for each x). You can still find domain. Cross out duplicates. Then put them in order from least to greatest. For a perfect anser, use the curly brackets and commas.
Example: (1,0), (4,0), (1,3), (2,2)
X values 1 4 1 2
cull duplicates 1 4 2
In order 1 2 4
Domains is {1,2,4}

Good luck

Answer 42

Range is the same idea for the y values. Just list them and remove the duplicates and order them.