The correct answer to the question is option 2. In the given figure, the graph represents the relationship between current (I) and voltage (V) for a lamp. Based on the graph, as the voltage increases, the current also increases. This indicates a positive linear relationship between voltage and current.

Option 1: This option is not correct because it suggests that the current decreases as the voltage increases, which contradicts the information provided in the graph.

Option 3: This option is not correct because it suggests that the current remains constant regardless of the voltage, which again contradicts the information from the graph.

Option 4: This option is not correct because it suggests a non-linear relationship between voltage and current, which is not indicated by the graph.

Therefore, option 2 is the correct answer as it accurately represents the positive linear relationship between voltage and current indicated by the graph.