Posted by **Izzy** on Thursday, March 1, 2012 at 7:32pm.

Tell whether the graph opens upward or downward. Then find the axis of symmetry and vertex of the graph of the function.

y=-1/4x^2-24

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**MathMate**, Thursday, March 1, 2012 at 7:39pm
y=-1/4x^2-24

Hints:

If the leading coefficient of a quadratic expression is negative, it opens downwards.

For a general quadratic equation

y=ax²+bx+c,

The axis of symmetry is at the line

y=-b/2a

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**Poop.**, Thursday, March 1, 2012 at 7:45pm
Which one is the B in my equation?

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**MathMate**, Thursday, March 1, 2012 at 8:57pm
y=ax˛+bx+c,

b is the coefficient of the term in x.

Since your expression does not have an x-term, b=0.

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**Poop.**, Thursday, March 1, 2012 at 10:07pm
Thank you!

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**MathMate**, Thursday, March 1, 2012 at 10:17pm
You're welcome!

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