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, and arrows extending to both the left and right to show that all other values (less than and greater than 7) are included.
Therefore, the correct representation of \( g \neq 7 \) would be:
hollow circle at 7, with arrows extending to the left and right.