anonymous
  • anonymous
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
Mathematics
chestercat
  • chestercat
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unknownunknown
  • unknownunknown
f(x) = y. When x is 4... y is.. ?
anonymous
  • anonymous
wait... @unknownunknown i thought Y would be 4.. right?
anonymous
  • anonymous
wouldnt X be -4 and y be 4?

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anonymous
  • 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
  • anonymous
so its C?
unknownunknown
  • 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
  • anonymous
If Y = 4 then X would equal 0.
anonymous
  • anonymous
wait.. no its A? -4?
UsukiDoll
  • UsukiDoll
no :/
geerky42
  • 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
  • unknownunknown
As monkiwi said. Go to the value of x on the graph. What is the y value at that point?
anonymous
  • anonymous
No, it isn't -4. Look at where the points intersect.
anonymous
  • anonymous
If Y = -4 X = -8
anonymous
  • anonymous
so i was right the first time.. its 4.. right?
UsukiDoll
  • UsukiDoll
o___O
anonymous
  • anonymous
its not 4?? how is it not? the y meets at the 4??
UsukiDoll
  • 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
  • geerky42
|dw:1433129711758:dw|
UsukiDoll
  • UsukiDoll
wow thanks for giving out the direct answer -_-!
unknownunknown
  • 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
  • anonymous
MY *************************************!!!! I AM THE MOST IDIOT PERSON!! I SWEAR.. u guys prob think im 3.. ugh! its 8..
geerky42
  • geerky42
Not really direct answer...
anonymous
  • anonymous
dont tell me its not 8??? if its not 8.. dear .. my brain
geerky42
  • geerky42
I was just repeat @MonKiwi 's explanation as visual explanation.
UsukiDoll
  • UsukiDoll
if you think that's tough, check out all the questions I've asked >:D
anonymous
  • anonymous
ok.. well my brain just xploded.. ugh who do i give medal too?? u all helped.. ALOT..
geerky42
  • geerky42
No one :)
anonymous
  • anonymous
none?
UsukiDoll
  • UsukiDoll
yeah make it fair.. no one
anonymous
  • anonymous
um ok..
UsukiDoll
  • UsukiDoll
wait until next question then anyone can free for all.
geerky42
  • geerky42
Go to http://mathoverflow.net/ And @UsukiDoll 's question will be nothing :)
anonymous
  • anonymous
let me do this. one sec
UsukiDoll
  • UsukiDoll
what does that supposed to mean?
UsukiDoll
  • UsukiDoll
Oh I see! Hey man I'm getting there slowly but surely :P
anonymous
  • 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
  • anonymous
first to answer ill medal.. plis explain :D
UsukiDoll
  • UsukiDoll
I'm out. This is too easy... I wanna do ODEs
anonymous
  • anonymous
plis.. cmon! D:
anonymous
  • anonymous
just answer.. cmon!! D::::
anonymous
  • anonymous
the smart ones think im dumb.. and im a straight A student.. YIKEs
UsukiDoll
  • UsukiDoll
fineeeeeeeeeeeee F(x) -> F(5) implies that x = 5. just find where x = 5 in your chart and you will have y
anonymous
  • anonymous
so c?
UsukiDoll
  • UsukiDoll
seriously?
anonymous
  • anonymous
im sorry.. Im really trying here. you said the 5. and on the chart it has a 2 by it..
UsukiDoll
  • 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
  • anonymous
so b..
UsukiDoll
  • UsukiDoll
yeah
anonymous
  • anonymous
i gave u medal.. sorry for wasting ur time.. :/

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