Answer:
650,000,000
Step-by-step explanation:
Reading your graph, the numbers below are actually in hundred millions as indicated by the title of your graph. So when it says 5, it actually means 5 x 100,000,000 so that is 500,000,000.
In India, the bar stops at around 9 while the US is around 2.5 because the bar stops half-way to 5.
The population of India is 9 x 100,000,000 = 900,000,000
The population of US is 2.5 x 100,000,000 = 250,000,000
The question is how many more people live in India than in the US, so we just find the difference between the two (we subtract):
900,000,000 - 250,000,000 = 650,000,000