Employing a quadratic relationship to model sea level changes, which would imply a non-linear effect.

Assuming the sea level remains constant, regardless of temperature changes.

Using a model where sea level rise doubles with each additional degree Celsius, indicating an exponential relationship.

Using the model $$\Delta L=0.1*\Delta T$$ so that a 2°C increase results in a 0.2 m rise in sea level, directly reflecting the data.