Determine whether the graph of the quadratic function opens up or down.
-$f ( x ) = x ^ { 2 } + 8 x - 2$
A)down
B)up

Name: Determine whether the graph of the quadratic function opens up or down. -$f ( x ) = x ^ { 2 } + 8 x - 2$ A)down B)up
Brand: Quizplus
Rating: 4.8 (36 reviews)

Question

Quizplus · Accepted Answer

The graph of a quadratic function $f(x) = ax^2 + bx + c$ opens up if $a > 0$ and down if $a < 0$. In this case, $a = 1$, which is greater than 0, so the graph opens up.

Determine Whether the Graph of the Quadratic Function Opens Up f(x)=x2+8x−2f ( x ) = x ^ { 2 } + 8 x - 2f(x)=x2+8x−2

Determine Whether the Graph of the Quadratic Function Opens Up $f ( x ) = x ^ { 2 } + 8 x - 2$