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- anonymous

help, graph of f(x)=x^3+2x^2-4x-8. HOw you can graph it by hand.

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- anonymous

help, graph of f(x)=x^3+2x^2-4x-8. HOw you can graph it by hand.

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- anonymous

I think you had a similar question yesterday. What don't you understand?

- anonymous

ok you set f(x) as 0,

- anonymous

and do gropuping, but i forgot how to keep going, i just need like how to start graphing.

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- anonymous

x^3 function is a familiar function, you should know it. That is a start

- anonymous

can you help me out,

- anonymous

i just don't want to make a mistake, and go take the test, with the mistake

- anonymous

Look, usually in front of book, for picture of familiar graphs, you would see one of x^3

- anonymous

Yesterday, I gave you end behavior of functions ax^n, What is end behavior when n is odd, a>0?

- anonymous

like do the first step, i need to learn how to graph it by hand.

- anonymous

like do the first step, i need to learn how to graph it by hand.

- anonymous

We talked about this yesterday here, you didn't say, great I got it, or no I still don't understand it http://openstudy.com/users/chaguanas#/users/chaguanas/updates/4dd93550d95c8b0b564164c4

- anonymous

it don't really help me much, i need to learn how to graph it

- anonymous

That is why I can't help you. I am telling you stuff to help you graph it and you are saying it doesn't help you.

- anonymous

ok, do it like if you were going to graph the fucntion

- anonymous

When you are graphing these things, it is not like high school where you get an x, get a y. It is intuitive. When they say end behavior that means one end is pointing one way, and so on. You find where it crosses x (x intercept) and where it crosses y (y intercept). It is a feeling a drawing, Not exact. So you have to have a basic idea of what an x^3 function looks like. I found one here http://www.google.com/imgres?imgurl=http://hotmath.com/hotmath_help/topics/cubic-functions/cubic-functions.gif&imgrefurl=http://hotmath.com/hotmath_help/topics/cubic-functions.html&h=300&w=300&sz=6&tbnid=YbJQkyHmHbgMfM:&tbnh=116&tbnw=116&prev=/search%3Fq%3Dx%2B3%2Bfunction%26tbm%3Disch%26tbo%3Du&zoom=1&q=x+3+function&hl=en&usg=__qWLwnpJWeQoFkqxZUFfy_7zXFTA=&sa=X&ei=ItrZTfv4BJCctwe7_ZnpDg&sqi=2&ved=0CEsQ9QEwBA

- anonymous

That one didn't come out http://hotmath.com/hotmath_help/topics/cubic-functions.html

- anonymous

what is the end behavoir?

- anonymous

The graph goes on to infinity, so basically you just draw a line in the direction and put an arrow at the end to denote it goes on to infinity, the graph is just a representation.

- anonymous

so infinity,inifyt

- anonymous

so infinity,inifyt

- anonymous

Just look at the link I sent you above, you would see the graph is cut off at both ends, but it is understood that it continues.

- anonymous

which one?

- anonymous

so en behavior, summaryes inifty,infity

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