Question

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

Answer 1

f(x) = y.

When x is 4... y is.. ?

Answer 2

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

Answer 3

wouldnt X be -4 and y be 4?

Answer 4

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.

Answer 5

so its C?

Answer 6

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)

Answer 7

If Y = 4 then X would equal 0.

Answer 8

wait.. no its A? -4?

Answer 9

no :/

Answer 10

"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."

Answer 11

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

Answer 12

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

Answer 13

If Y = -4 X = -8

Answer 14

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

Answer 15

o___O

Answer 16

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

Answer 17

we are given f(4) where x = 4.... go to where x = 4

it's like ... (4, y) who is the y in here?

Answer 18

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

Answer 19

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)

Answer 20

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

Answer 21

Not really direct answer...

Answer 22

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

Answer 23

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

Answer 24

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

Answer 25

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

Answer 26

No one :)

Answer 27

none?

Answer 28

yeah make it fair.. no one

Answer 29

um ok..

Answer 30

wait until next question then anyone can free for all.

Answer 31

Go to http://mathoverflow.net/

And @UsukiDoll 's question will be nothing :)

Answer 32

let me do this. one sec

Answer 33

what does that supposed to mean?

Answer 34

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

Answer 35

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

Answer 36

first to answer ill medal.. plis explain :D

Answer 37

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

Answer 38

plis.. cmon! D:

Answer 39

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

Answer 40

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

Answer 41

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

Answer 42

so c?

Answer 43

seriously?

Answer 44

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

Answer 45

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

Answer 46

so b..

Answer 47

yeah

Answer 48

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