Answer
The interval notation of the given expression is: $[6, \infty)$
Work Step by Step
The inequality includes all numbers that are greater than or equal to $6$.
Thus, the interval notation of the given expression is: $[6, \infty)$.
To graph the inequality, plot a solid at $x=6$, then shade the region to its right.
(refer to the attached image in the answer part above)
