Which of the following is the equation of the axis of symmetry for the function?

y = x2 -4x + 8

A. y = 2x
B. x = 2
C. y = -2
D. x = -4 Which of the following is the equation of the axis of symmetry for the function?

y = x2 -4x + 8

A. y = 2x
B. x = 2
C. y = -2
D. x = -4 @Mathematics

Question

Which of the following is the equation of the axis of symmetry for the function?

y = x2 -4x + 8

A.	y = 2x
	B.	x = 2
	C.	y = -2
	D.	x = -4 Which of the following is the equation of the axis of symmetry for the function?

y = x2 -4x + 8

A.	y = 2x
	B.	x = 2
	C.	y = -2
	D.	x = -4 @Mathematics

amistre64 · Answer

-b/2a

anonymous · Answer

Wait what?

amistre64 · Answer

yeah, it helps to pay attention :)

amistre64 · Answer

ax^2 + bx + c

the axis of symmetry is -b/2a

anonymous · Answer

Um yeah, I am aware of that.. it just doesn't have that answer in the choices of answers for that question...

amistre64 · Answer

a and c are out, and d is a trick

amistre64 · Answer

it does, you just have to understand what it looks like ...

anonymous · Answer

So basically it's just looking at 2, not the others around it?

amistre64 · Answer

:)  the answer is x=2 yes

anonymous · Answer

Okay thank you!! :)