Are these two phrases the same . I am not sure what it is asking for.

  • Thread starter squirt552
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Homework Statement



First example f(x)=1/4 (x+4)^2 +7
Asks for vertex and the line of symmetry and the value of f(x) and maximim or minimum
This is no problem vertex= (-4,7) line of symmetry is -4 value f(x)= 7


second problem f(x)=x^2 -10x -2

vertex (5, -27)
but now ask for the equation of the line of symmetry


Is: the line of symmetry and: the equation of the line of symmetry the same thing?

information shows the line of symmetry is x= - b/2a. okay so how do I show this as an equation if the line of symmetry is 5

Homework Equations





The Attempt at a Solution

 

Answers and Replies

  • #2
tiny-tim
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Welcome to PF!

Hi squirt552! Welcome to PF! :smile:
line of symmetry is -4 …
hmm … line of symmetry is x = -4 :wink:
Is: the line of symmetry and: the equation of the line of symmetry the same thing?
Well, you have to describe the line in some way, and the easiest (and only sensible) way is by using an equation, so … yes! :smile:
information shows the line of symmetry is x= - b/2a. okay so how do I show this as an equation if the line of symmetry is 5
(you mean x = 5)

Well, if the line of symmetry is x= - b/2a and x = 5,

then that means that - b/2a = … ? :smile:
 

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