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- anonymous

i dont understand funtions please help
Which ordered pairs in the form of (x,y) does not represent a funtion of x? (-1,2),(3,2),(0,1),(5,2)
(-1,2),(3,2)(-2,2),(0,2)
(1,2),(3,2),(0,1),(3,5) and (-1,2),(2,3),(3,-2),(-2,0)

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- anonymous

- chestercat

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- Mehek14

what kind of functions?

- anonymous

(-1,2),(3,2),(0,1),(5,2)
-1,2/3,2/-2,2/0,2
1,2/3,2/0,1/3,5 and -1,2/2,3/3,-2/-2,0

- anonymous

can you explain how i would solve this

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- Mehek14

I don't understand ur question

- anonymous

those four sets are the ordered pairs they gave me in (x,y) form im to find which set does not represent a function of x

- anonymous

(-1,2),(3,2),(0,1),(5,2)
(-1,2),(3,2)(-2,2),(0,2)
(1,2),(3,2),(0,1),(3,5) and (-1,2),(2,3),(3,-2),(-2,0)

- Mehek14

hm you might want to tag some people

- anonymous

im new on here i wouldnt know to to tag

- anonymous

who to tag

- Mehek14

just put the @ sign

- Mehek14

there are many people online

- anonymous

but to who is the question i dont know who to @

- Mehek14

go to the home page of mathematics and on the right you will see all the people online
tag them

- anonymous

- anonymous

thanks @Mehek14

- jim_thompson5910

Look for sets of points that have repeated x values to find the non-function.
Example:
{ (5,7), (5,8), (10,19), (12,27) }
The x coordinate x = 5 pops up more than once, so this relation isn't a function.

- anonymous

so to find the answer for my question i would only have to find the x the repeats?

- jim_thompson5910

yes

- anonymous

so c would be the answer?

- anonymous

(1,2),(3,2),(0,1),(3,5) this one?

- jim_thompson5910

yep it's (1,2),(3,2),(0,1),(3,5) since x = 3 shows up twice

- jim_thompson5910

A function must produce exactly one output for any given input. With the input of 3, we ask ourselves "what is the true output? 2? or 5?". Since we don't know for sure we just say it's not a function

- anonymous

thanks so much you explain that better than my teacher could you help with a few more?
like explain them to me?

- jim_thompson5910

sure I can help

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