Match the set described with the correct interval notation. Choices may be used once, more than once, or not at all.
-domain of $f(x)=x^{2}+9$
A) $[0, \infty)$
B) $[9, \infty)$
C) $(-\infty, 9]$
D) $(-9, \infty)$
E) $(-\infty, \infty)$
F) $(9, \infty)$
G) $(-\infty, 0]$
H) $[-9, \infty)$

Question

Quizplus · Accepted Answer

The domain of $f(x) = x^2 + 9$ includes all real numbers because there are no restrictions on the values that $x$ can take. The function is defined for every real number, hence the correct interval notation is $(-\infty, \infty)$.

Match the Set Described with the Correct Interval Notation f(x)=x2+9f(x)=x^{2}+9f(x)=x2+9 A) [0,∞)[0, \infty)[0,∞)

Match the Set Described with the Correct Interval Notation $f(x)=x^{2}+9$ A) $[0, \infty)$