Fill in the blank with one of the words or phrases listed below.

-The graph of $f ( x ) = a x ^ { 2 } + b x + c$, where $a$ is not 0 , is a parabola whose vertex has an $x$-value ofــــــــــــــــــ
A) $( h , 0 )$
B) $\pm \sqrt { b }$
C) $( h , k )$
D) $\frac { - b } { 2 a }$

Question

Fill in the blank with one of the words or phrases listed below.

-The graph of $f ( x ) = a x ^ { 2 } + b x + c$, where $a$ is not 0 , is a parabola whose vertex has an $x$-value ofــــــــــــــــــ
A) $( h , 0 )$ 
B) $\pm \sqrt { b }$ 
C) $( h , k )$ 
D) $\frac { - b } { 2 a }$

Quizplus · Accepted Answer

The x-value of the vertex of a parabola given by the quadratic function $f(x) = ax^2 + bx + c$ is $\frac{-b}{2a}$.

Fill in the Blank with One of the Words or Phrases