To solve the inequality \(x + 3 \leq 7\), we start by isolating \(x\):
\[ x + 3 \leq 7 \] \[ x \leq 7 - 3 \] \[ x \leq 4 \]
This means that the solution set includes all numbers less than or equal to 4.
On a number line, this is represented by a closed circle at 4 (indicating that 4 is included in the solution set) and a line extending from 4 to the left (indicating that all numbers less than 4 are included).
Therefore, the correct option is:
2. A number line with arrows at both the ends ranges from negative 10 to 10 in unit increments. A closed circle is marked on the tick line above 4. A line is drawn from 4 toward negative 10 with an arrow at the end.