SOLUTION: Professor I have a couple questions on vertex giving parabola. F(x) = -9x� my first question is, no matter what number it is in the place of the 9, my points will always be (0,0

Question 669222: Professor I have a couple questions on vertex giving parabola.
F(x) = -9x�
my first question is, no matter what number it is in the place of the 9, my points will always be (0,0)? And my second question is if I was to.graph, my line would go down because its negative correct. It'll look like an upside down V?
Found 2 solutions by Alan3354, stanbon:
Answer by Alan3354(69443) (Show Source): You can put this solution on YOUR website!
I have a couple questions on vertex giving parabola.
F(x) = -9x�
my first question is, no matter what number it is in the place of the 9, my points will always be (0,0)?
--------
That's true.
f(x) = ax^2
f(0) = 0 --> (0,0)
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And my second question is if I was to.graph, my line would go down because its negative correct. It'll look like an upside down V?
It will open downward, or "not hold water."
Similar to an upside down V, but doesn't have a point.

Answer by stanbon(75887) (Show Source): You can put this solution on YOUR website!
F(x) = -9x�
my first question is, no matter what number it is in the place of the 9, my points will always be (0,0)?
Yes, the vertex will be at (0,0).
------------------------------------
And my second question is if I was to graph, my parabola would open down because its negative. correct?.
It'll look like an upside down V?
correct
==============================
Cheers,
Stan H.
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