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- iwanttogotostanford

P

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- iwanttogotostanford

@triciaal

- DanJS

well if you divide a degree 2 by a a degree 1 function, looks like you will get a degree 2-1 function,
a line

- DanJS

factor the polynomial, an you see the denominator is then gone
but you have to keep track that that can not be 0, or x cant equal -4

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## More answers

- iwanttogotostanford

would y be -1 or -9 ? @danjs

- Pawanyadav

You will get after factorization
(x+5)(x+4)/(x+4)
=(x+5)
So you get y=x+5
Can you plot it

- iwanttogotostanford

ok, but would my coordinates be (4,-9) or (4,-1)

- iwanttogotostanford

@Pawanyadav

- Pawanyadav

(4,9)
Plug x=4
Then y=x+6=4+5=9
So (4,9)

- Pawanyadav

That was 5 not 6

- iwanttogotostanford

thats not one of the choices though there has to be a negative in there

- Pawanyadav

Can you show me the choices

- Pawanyadav

Are you there

- triciaal

|dw:1449414289123:dw|

- triciaal

|dw:1449414485675:dw|

- iwanttogotostanford

@triciaal so would x be 4??

- iwanttogotostanford

would y be -1 or -9? it has to be one of the two:-) @triciaal

- iwanttogotostanford

@zepdrix @pooja195

- iwanttogotostanford

I just need confirmation on the coordinats

- iwanttogotostanford

@radar

- iwanttogotostanford

@secret66 @Pawanyadav

- Pawanyadav

It can't be one of them

- Pawanyadav

Would be better if show the choices

- iwanttogotostanford

ok sure

- iwanttogotostanford

well the choices are graphs but the coordinate choices are as follows: (-4,1),(4,-1),(-4,9), and (4,-9) @Pawanyadav

- iwanttogotostanford

the point coordinates of course

- Pawanyadav

Can't be anyone of following choice
Should be (4,9)
As y=x+5

- iwanttogotostanford

the question says: what is the graph of the function: x^2+9x+20/x+4

- iwanttogotostanford

@Pawanyadav

- iwanttogotostanford

@Pawanyadav please help

- Pawanyadav

After solving it we get.
y=x+5 .right?

- iwanttogotostanford

ys, i think

- Pawanyadav

So it is a linear equation so
It's graph represents a straight line

- iwanttogotostanford

yes

- Pawanyadav

Than what's the problem

- iwanttogotostanford

well the answer you gave me isn't a choice

- Pawanyadav

The choices are not correct, simple

- iwanttogotostanford

well if you had to pick on ewhihch would it be because i have to pick out of these answers unfortunatley

- iwanttogotostanford

i really need help picking one, I'm not sure either

- iwanttogotostanford

@Pawanyadav

- Pawanyadav

What will happen if you don't pick anyone

- iwanttogotostanford

i will get it marked wrong which i don't want

- Pawanyadav

Pick anyone of them will also marked wrong

- Pawanyadav

If it's compulsory than pick A

- iwanttogotostanford

the point at -4,1?

- Pawanyadav

(Yes

- iwanttogotostanford

ok, thanks! @DanJS what do you think?

- DanJS

just got to the bottom here

- DanJS

well the choices are graphs but the coordinate choices are as follows: (-4,1),(4,-1),(-4,9), and (4,-9
it is the one where the y coord is the x-coord plus 5, [y=x+5]
1 = -4 + 5 , that point is on the graph

- iwanttogotostanford

so which coordinate would it be ? please I've been working on this problem for os long

- DanJS

and there is a hole discontinuity at x=-4

- iwanttogotostanford

which coordinate for the point on the graph would it be again? please:-) @DanJS

- iwanttogotostanford

so it would be C or D?

- Pawanyadav

Can I go now

- iwanttogotostanford

yeah lol

- iwanttogotostanford

@DanJS

- iwanttogotostanford

hello ? @DanJS

- iwanttogotostanford

i need to o now f you could tell me the answer that would be amazing I'm sorry i need to go but really need help please

- iwanttogotostanford

i really need the answer :-) but i need to go please help

- DanJS

man sorry i had to run out ,
this thing is simplified to y = x + 5, of those 4 points (x,y) that are given , (-4 , 1) works
x = -4 is still a solution because it checks out to work in the simplified function y = x + 5

- DanJS

in the original , if x=-4 , you get 0's places

- DanJS

look at "extraneous solutions for rational functions '

- iwanttogotostanford

@DanJS so, it would be A: (-4,1)?

- triciaal

|dw:1449463921888:dw|

- triciaal

another approach or to justify what I think:
f(-4) you would be dividing by zero
f(4) = 4^2 + 9*4 = 20 divided by 4 + 4 = 16 +36 + 20 over 8 = 72/8 = 9 hence (4, 9)

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