Posted by **Breona** on Wednesday, November 28, 2012 at 2:48pm.

Find the axis of symmetry for y=x^2+4x-7

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- Algebra -
**Steve**, Wednesday, November 28, 2012 at 3:02pm
for y=ax^2+bx+c, vertex is at x = -b/2a

if you complete the square, and have

(y-k) = a(x-h)^2 then

the vertex is at (h,k)

the axis of symmetry goes through the vertex.

the sign of the x^2 term determines whether the vertex is a min or max.

So, what do you come up with?

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