x Find the range of the quadratic function.
-$$f ( x ) = x ^ { 2 } + 4$$
A) $[ 4 , \infty )$
B) $( - \infty , 4 ]$
C) $[ - 4 , \infty )$
D) $[ 0 , \infty )$

Question

Quizplus · Accepted Answer

The quadratic function $f(x) = x^2 + 4$ is a parabola opening upwards with its vertex at (0, 4). The lowest value of $f(x)$ is 4, and as $x$ increases or decreases from 0, $f(x)$ increases without bound. Therefore, the range is $[4, \infty)$.

X Find the Range of the Quadratic Function f(x)=x2+4f ( x ) = x ^ { 2 } + 4f(x)=x2+4

X Find the Range of the Quadratic Function $f ( x ) = x ^ { 2 } + 4$