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The graph of the equation y=ax^2+bx+c  has the line  x=4 as an axis of symmetry. Find b/a .

 Mar 9, 2020

Best Answer 

 #3
avatar+26006 
+2

It means that   - b/2a = 4     multiply both sides by -2

   b/a = -8

 Mar 10, 2020
 #1
avatar+111438 
+3

If x  = 4  is  the  axis of symmetry....then  the  x coordinate of the  vertex = 4

 

And  the  x coordinate  of the  vertex  =  -b/a

 

So

 

4 =  -b/a

 

-4 =  b/a

 

 

cool cool cool

 Mar 10, 2020
 #2
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0

Thakns, but it says its incorrect, do you mind verifying?

Guest Mar 10, 2020
 #3
avatar+26006 
+2
Best Answer

It means that   - b/2a = 4     multiply both sides by -2

   b/a = -8

ElectricPavlov Mar 10, 2020
 #4
avatar+111438 
+2

THX, EP!!!!

 

 

cool cool cool

CPhill  Mar 10, 2020

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