The description of the number line indicates that there is a closed circle at 1 and a line extending towards 10 with an arrow.
The closed circle at 1 means that 1 is included in the solution set, which is represented by the symbol "≥". The fact that the line extends towards 10 indicates that x can take any value greater than or equal to 1.
Thus, the correct linear inequality represented on the number line is:
\[ x \geq 1 \]