Final answer:
The inequality that represents the scenario is '2 ≥ p'. This means that the number of pencils, p, must be greater than or equal to 2.
Step-by-step explanation:
The inequality that represents the scenario where the teacher instructed the students to take out no less than 2 pencils from their backpacks is: 2 ≥ p.
This inequality states that the number of pencils, represented by p, must be greater than or equal to 2. In other words, the students should have at least 2 pencils.
For example, if a student has 3 pencils (p = 3), it satisfies the inequality because 3 is greater than or equal to 2.