To represent the inequality \( g \neq 7 \) on a number line, you would use a hollow circle at 7 to indicate that 7 is not included in the solution set. Then, arrows would extend to both the left and the right to signify that \( g \) can take on any value except for 7.
Therefore, the correct representation would be:
hollow circle at 7, with arrows extending to the left and right.