Based on the description you provided, the closed point at 2.5 indicates that 2.5 is included in the solution set, and the rightward arrow suggests that the values of \( x \) extend beyond 2.5. Therefore, the linear inequality shown on the number line can be expressed as:
\[ x \geq 2.5 \]
This indicates that \( x \) can be any number greater than or equal to 2.5.