## College Algebra (10th Edition)

Interval Notation: $(-\infty, 0]$. Inequality Form: $x \le 0$.
The graph involves an open bracket. This means that the number where the bracket is located is included in the interval. The graph goes to the left of $0$ without bound. This means that the lower limit is $-\infty$. The graph covers all the numbers to the left of, and including $0$. This means that the interval is $(-\infty, 0]$. The inequality equivalent of this is $x \le 0$.