Given the set sketched on the number line, identify the type of interval (open, closed, half-open, open infinite, closed infinite), write the set using set-builder notation, and write the set using interval notation. - A) closed infinite interval; $\{ x \mid x \geq - 9 \} ; [ - 9 , \infty )$ B) open infinite interval; $\{ x \mid x - 9 \} ; ( - 9 , \infty )$ D) closed infinite interval; $\{ \mathrm { x } \mid \mathrm { x } \leq - 9 \} ; ( - \infty , - 9 ]$

Question

Given the set sketched on the number line, identify the type of interval (open, closed, half-open, open infinite, closed infinite), write the set using set-builder notation, and write the set using interval notation.
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A) closed infinite interval; $\{ x \mid x \geq - 9 \} ; [ - 9 , \infty )$ 
B) open infinite interval; $\{ x \mid x < - 9 \} ; ( - \infty , - 9 )$ 
C) open infinite interval; $\{ x \mid x > - 9 \} ; ( - 9 , \infty )$ 
D) closed infinite interval; $\{ \mathrm { x } \mid \mathrm { x } \leq - 9 \} ; ( - \infty , - 9 ]$

Quizplus · Accepted Answer

The Answer of Given the set sketched on the number line, identify the type of interval (open, closed, half-open, open infinite, closed infinite), write the set using set-builder notation, and write the set using interval notation.
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A) closed infinite interval; $\{ x \mid x \geq - 9 \} ; [ - 9 , \infty )$ 
B) open infinite interval; $\{ x \mid x < - 9 \} ; ( - \infty , - 9 )$ 
C) open infinite interval; $\{ x \mid x > - 9 \} ; ( - 9 , \infty )$ 
D) closed infinite interval; $\{ \mathrm { x } \mid \mathrm { x } \leq - 9 \} ; ( - \infty , - 9 ]$

Given the Set Sketched on the Number Line, Identify the Type