anonymous
  • anonymous
how do you find the axis of symmetry? heres and example equation: F(x)=3(x+4)^2+1
Mathematics
  • Stacey Warren - Expert brainly.com
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SOLVED
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chestercat
  • chestercat
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jchick
  • jchick
The axis of symmetry is the vertical line that goes through the vertex of a quadratic equation.
anonymous
  • anonymous
@jchick can you help with this too? since its in vertex form would it be (4,1)?
anonymous
  • anonymous
I understand how to get it from a graph just not in vertex or standard equation form

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jchick
  • jchick
y=3(x+4)2+1
jchick
  • jchick
That is the vertex form
jchick
  • jchick
(−4,1) is the vertex
anonymous
  • anonymous
oh okay, I hforget that the h spot hould be a -
jchick
  • jchick
The standard form of a parabola's equation is generally expressed: y=ax2+bx+c
jchick
  • jchick
The vertex form of a parabola's equation is generally expressed as: y = a(x-h)^2+k
jchick
  • jchick
If a is positive then the parabola opens upwards like a regular "U". If a is negative, then the graph opens downwards like an upside down "U".
anonymous
  • anonymous
uh huh, and the axis is normally x=-b/2 a right ? for standard?>
jchick
  • jchick
Do you mean The axis of symmetry?
anonymous
  • anonymous
yes
jchick
  • jchick
ok
jchick
  • jchick
Axis of Symmetry from Standard Form ax^2 + bx + c
anonymous
  • anonymous
I get the vertex form now and what changes the direction a parabola open just not how to get the axis of symmetry in standard form.
jchick
  • jchick
a(x - h)^2 + k is vertex form
jchick
  • jchick
The first one is the standard form
jchick
  • jchick
Axis of Symmetry in Standard Form ax^2 + bx + c
anonymous
  • anonymous
yeah. so what gets the axis from standard?
jchick
  • jchick
The standard form of a parabola's equation is generally expressed: y=ax2+bx+c The role of 'a' If a>0, the parabola opens upwards if a<0 it opens downwards.
anonymous
  • anonymous
wait I thought that the standard form equation was ax^2+bx+C not the axis of symmetry .....
jchick
  • jchick
|dw:1439938305007:dw|
anonymous
  • anonymous
???
jchick
  • jchick
that is the axis of symmetry
jchick
  • jchick
anonymous
  • anonymous
-5/2a? what that from??
jchick
  • jchick
That is -b on top
jchick
  • jchick
sorry bad drawing
jchick
  • jchick
jchick
  • jchick
Do you understand now?
jchick
  • jchick
|dw:1439938524109:dw|
anonymous
  • anonymous
that's okay. so if I had 2x^2-16x+15 the axis of symmetry would be 16/2(2) so itd be 4?
jchick
  • jchick
Yes
anonymous
  • anonymous
oh okay now I get it
jchick
  • jchick
Ok good I didn't mean to be confusing.
anonymous
  • anonymous
its okay
jchick
  • jchick
Don't forget to fan me and also to give a medal for answers
jchick
  • jchick
If you fan me it is easier for me to find your future questions
jchick
  • jchick
Do you have anymore questions
anonymous
  • anonymous
I did fan you on the last ? and idk yet I might.. ill tag you in the though..
jchick
  • jchick
Ok I didn't see it sorry lol
jchick
  • jchick
Ok

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