using this link can i find the answer : The graph of this quadratic function is a parabola. What is the equation of the axis of symmetry? y=x^2-3
http://www.wolframalpha.com/input/?i=y%3Dx^2-3

Question

using this link can i find the answer : The graph of this quadratic function is a parabola. What is the equation of the axis of symmetry? y=x^2-3
http://www.wolframalpha.com/input/?i=y%3Dx^2-3

anonymous · Answer

axis of symmetry is x = -b/a where y = ax^2 + bx + c

anonymous · Answer

so yes or no

anonymous · Answer

?

anonymous · Answer

press the link

anonymous · Answer

does it answer the question

anonymous · Answer

no

anonymous · Answer

so how would i figure it out

debbieg · Answer

Another way to think of it is this:

$$\Large x=x_{vertex}$$

Where the $x_{v}$ means the x-coordinate of the vertex.

debbieg · Answer

Yes, you CAN get it from that link, if you know what to look for.

anonymous · Answer

did you see what i wrote?

what's a?  what's b?

anonymous · Answer

@ deebue were us it

anonymous · Answer

@DebbieG  were is it

debbieg · Answer

Remember that the vertex is always where the max or min occurs.

But @pgpilot326 's explanation is the algebraic way to do it.

debbieg · Answer

Read everything we've both written. Do you understand what we've told you about the axis of symmetry? What the equation is?

REmember, the axis of symmetry is just a vertical line, through the x-coordinate of the vertex.

anonymous · Answer

i no but i just need the anwser u said i can find it usin the linik so were would i look

anonymous · Answer

@DebbieG

anonymous · Answer

he said he's looking for the axis of symemetry, not necessarily where the vertex is.  while it's true that the vertex lies on the axis of symmetry, it doesn't give it directly

anonymous · Answer

you still have to write the equation of the line

debbieg · Answer

You would look wherever you can find the x-coordinate of the vertex.

anonymous · Answer

so press plot?

debbieg · Answer

I think he said "using this link can i find the answer". So I would have to disagree @pgpilot326 . The link has everything needed to find the answer. :)

debbieg · Answer

To repeat:

REmember, the axis of symmetry is just a vertical line, through the x-coordinate of the vertex.

Remember that the vertex is always where the max or min occurs.

anonymous · Answer

yes i am beacuse i dont need this in my life so im not gona sit here and take time to this i just need to do this to graduate

anonymous · Answer

im home scholled

debbieg · Answer

Well, OpenStudy is not here as a Homework Answer Factory, so if you just want answers, I'll with you well and say have a good day. The idea here is to learn how to do the problem.

anonymous · Answer

@DebbieG  so should i press plot

anonymous · Answer

@DebbieG ?