Questions

To determine which region showed a 50 percent increase in the tiger population between 2014 and 2018, I would need to analyze the graph. However, since I cannot see the graph, I can provide a general answer based on known trends in India's tiger census reports.

From past data, Shivalik Hills and Gangetic Plains have shown significant increases in tiger numbers due to conservation efforts in Uttarakhand (e.g., Jim Corbett National Park). However, if you have the exact graph data, you can verify the percentage increase by checking the numbers for 2014 and 2018 and applying the formula:

$\frac{\text{Tiger population in 2018}-\text{Tiger population in 2014}}{\text{Tiger population in 2014}}\times 100$

If you can share the specific figures from the graph, I can confirm the answer with exact calculations!