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The graph of the equation $y =ax^2 + bx + c$, where $a$, $b$, and $c$ are constants, is a parabola with axis of symmetry $x = -3.$ Find b/a.

 

Thanks guys!

 Feb 10, 2019
 #1
avatar+10622 
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The graph of the equation $y =ax^2 + bx + c$, where $a$, $b$, and $c$ are constants, is a parabola with axis of symmetry $x = -3.$ Find b/a.

laugh

 Feb 10, 2019
 #2
avatar+7725 
+2

A parabola with equation y = ax2 + bx + c has an axis of symmetry at x = -b/(2a).

 

That means -b/(2a) = -3 in this case.

b/(2a) = 3

b/a = 6.

 Feb 10, 2019

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