To evaluate the extension value (x) under a 6 N load using the formula F = kx, one must first determine the spring constant (k) from experimental data. Participants discussed measuring the spring's elongation at various weights, noting that both increasing and decreasing loads yielded similar extension values. The confusion arose around the purpose of the "Decreasing" column in the data table, as it seemed to contradict the expected behavior of the spring. Ultimately, the relationship between weight and extension is positive, and the correct approach involves using measured values to solve for k before calculating x for the 6 N load. Understanding the relationship and accurately applying the formula is crucial for solving the problem.