All three springs show the same relationship between the weight and extension what is relationship tick one box

The extension is directly proportional to the force exerted by the weight on the spring.

Explanation:

When the weight is suspended to a spring , the spring is extended through a length say x cm . This displacement is directly proportional to the force exerted on the spring equal to its weight.

Mathematically

F ∝ -x

F= -kx

where x is the displacement of the spring and k is the spring's constant whose value depends on the stiffness of the spring. F is the force exerted by the weight on the spring.

If more weight is added the extension will be greater . If less weight / force is applied the extension in the spring will be less.

the answer is 3.1 his answer is wrong mines is right