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Y= -2(x+5)^4 A few things about graphing this ? HELP?

  1. Sep 25, 2011 #1
    y= -2(x+5)^4 A few things about graphing this ? HELP???

    I know how to graph most parts of this function except for these few little details that are bugging me HELP?
    y= -2(x+5)^4

    It's a parabola.
    then you just need to figure out x and y intercepts, i know the y i just figured it out, but how do you figure out the x intercept? In words can anyone explain? I already have the answer in the book, just not the method for it in words. when I tried to get the other intercept this is what happened, well, so far i set everything equal to zero, to find the x intercept. but there's nothing else to do to simplify to solve for y, do you factor it?
     
  2. jcsd
  3. Sep 25, 2011 #2

    Mentallic

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    Re: y= -2(x+5)^4 A few things about graphing this ? HELP???

    It is shaped like a parabola, but it is not a parabola! Parabolas are quadratic, i.e. a polynomial with the highest power being 2.

    To solve for the y-intercept, you plugged in x=0 into the equation, yes? To solve for the x-intercept you just need to solve for x when y=0. Just plug y=0 into the equation and see if you can solve for x. It's quite easy too, just think of what x needs to be in order for the right side to be equal to 0.
    Hint: If an=0 for some non-zero n, then a=0.
     
  4. Sep 25, 2011 #3

    symbolipoint

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    Re: y= -2(x+5)^4 A few things about graphing this ? HELP???

    What I said here was wrong.
     
    Last edited: Sep 25, 2011
  5. Sep 25, 2011 #4

    symbolipoint

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    Re: y= -2(x+5)^4 A few things about graphing this ? HELP???

    The graph only appears like a parabola. It will open down so there is a highest point. The rest is like Mentallic said.
     
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