Find the domain and range of the quadratic function whose graph is described.
-The maximum is $- 6$ at $x = - 1$
A) Domain: $( - \infty , \infty )$
Range: $( - \infty , - 1 ]$
B) Domain: $( - \infty , \infty )$
Range: $[ - 6 , \infty )$
C) Domain: $( - \infty , - 1 ]$
Range: $( - \infty , - 6 ]$
D) Domain: $( - \infty , \infty )$
Range: $( - \infty , - 6 ]$

Question

Quizplus · Accepted Answer

The domain of a quadratic function is always $( - \infty , \infty )$. The range is determined by the vertex of the parabola. The vertex is $(- 1 , - 6$), so the range is $( - \infty , - 6 ]$.

Find the Domain and Range of the Quadratic Function Whose −6- 6−6

Find the Domain and Range of the Quadratic Function Whose $- 6$