1. **State the problem:** We are given a number line with an open circle at 4 and an arrow pointing to the right from 4. 2. **Interpret the open circle:** An open circle at 4 means that 4 is not included in the solution set. 3. **Interpret the arrow direction:** The arrow pointing to the right indicates all numbers greater than 4 are included. 4. **Write the inequality:** Since 4 is not included and values greater than 4 are included, the inequality is $x > 4$. 5. **Summary:** The number line shows the inequality $x > 4$.