The problem asks to write down the inequality in $x$ represented by the given number line diagram. The diagram shows a closed circle at $-3$ and an arrow pointing to the right.

1. Problem Description

The problem asks to write down the inequality in $x$ represented by the given number line diagram. The diagram shows a closed circle at $-3$ and an arrow pointing to the right.

2. Solution Steps

The closed circle at $-3$ means that $-3$ is included in the solution. The arrow pointing to the right means that all numbers greater than $-3$ are also included in the solution. Therefore, the inequality is $x \ge -3$.

3. Final Answer

$x \ge -3$