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

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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.

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Guest Feb 10, 2019

Omi67 · Answer 1 · 2019-02-10T08:18:39

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.

MaxWong · Answer 2 · 2019-02-10T01:57:25

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.