What is f(4)?
A.
–4
B.
0
C.
4
D.
8
http://static.k12.com/calms_media/media/1417000_1417500/1417262/1/b402be9d10a6391d7ede4da4886305bb2b01d733/MS_PA_130905_170068.jpg

- anonymous

- chestercat

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- unknownunknown

f(x) = y.
When x is 4... y is.. ?

- anonymous

wait... @unknownunknown i thought Y would be 4.. right?

- anonymous

wouldnt X be -4 and y be 4?

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## More answers

- anonymous

Well, similar to your last one. F(x) is the normal format. So, in this case, X = 4. Go along the X line until you reach 4. Then, go up until you hit the line. This, is where your Y line is, and your answer.

- anonymous

so its C?

- unknownunknown

Remember, a function gives us what's called a "dependent variable" from an"independent variable".
If x is 4, it doesn't mean y will be 4. So f(x) does not equal x. f(4) is not necessarily 4. f(4) will be the y coordinate (4,y)

- anonymous

If Y = 4 then X would equal 0.

- anonymous

wait.. no its A? -4?

- UsukiDoll

no :/

- geerky42

"X = 4. Go along the X line until you reach 4. Then, go up until you hit the line. This, is where your Y line is, and your answer."

- unknownunknown

As monkiwi said. Go to the value of x on the graph. What is the y value at that point?

- anonymous

No, it isn't -4. Look at where the points intersect.

- anonymous

If Y = -4 X = -8

- anonymous

so i was right the first time.. its 4.. right?

- UsukiDoll

o___O

- anonymous

its not 4?? how is it not? the y meets at the 4??

- UsukiDoll

we are given f(4) where x = 4.... go to where x = 4
it's like ... (4, y) who is the y in here?

- geerky42

|dw:1433129711758:dw|

- UsukiDoll

wow thanks for giving out the direct answer -_-!

- unknownunknown

Remember, your answer can only include somewhere that's actually a point on the graph (in this case the infinite points contained in the line)

- anonymous

MY *************************************!!!! I AM THE MOST IDIOT PERSON!! I SWEAR.. u guys prob think im 3.. ugh! its 8..

- geerky42

Not really direct answer...

- anonymous

dont tell me its not 8??? if its not 8.. dear .. my brain

- geerky42

I was just repeat @MonKiwi 's explanation as visual explanation.

- UsukiDoll

if you think that's tough, check out all the questions I've asked >:D

- anonymous

ok.. well my brain just xploded.. ugh who do i give medal too?? u all helped.. ALOT..

- geerky42

No one :)

- anonymous

none?

- UsukiDoll

yeah make it fair.. no one

- anonymous

um ok..

- UsukiDoll

wait until next question then anyone can free for all.

- geerky42

Go to http://mathoverflow.net/
And @UsukiDoll 's question will be nothing :)

- anonymous

let me do this. one sec

- UsukiDoll

what does that supposed to mean?

- UsukiDoll

Oh I see! Hey man I'm getting there slowly but surely :P

- anonymous

what is F(5)
A.
–8
B.
0
C.
2
D.
5
http://static.k12.com/calms_media/media/1417000_1417500/1417260/1/35db032be3c6dfeeebcc053d76b1a6f3345aa510/MS_PA_130905_170066.jpg

- anonymous

first to answer ill medal.. plis explain :D

- UsukiDoll

I'm out. This is too easy... I wanna do ODEs

- anonymous

plis.. cmon! D:

- anonymous

just answer.. cmon!! D::::

- anonymous

the smart ones think im dumb.. and im a straight A student.. YIKEs

- UsukiDoll

fineeeeeeeeeeeee F(x) -> F(5) implies that x = 5. just find where x = 5 in your chart and you will have y

- anonymous

so c?

- UsukiDoll

seriously?

- anonymous

im sorry.. Im really trying here. you said the 5. and on the chart it has a 2 by it..

- UsukiDoll

I said f(x) was the standard notation of a function . If we have something like f(5).. then
.. I said x = 5 because f(x) -> f(5) implies that x = 5. on the x chart LOOK UP 5

- anonymous

so b..

- UsukiDoll

yeah

- anonymous

i gave u medal.. sorry for wasting ur time.. :/

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