Consider the following population and year graph (Fig 10.10), find the slope of the line AB and using it, find what will be the population in the year 2010?

Question

Philoid · Accepted Answer

Since the line AB passes through points A (1985, 92) and

B (1995, 97), its slope will be

Let y be the population in the year 2010. Then, according to the given graph the AB must pass through point C ( 2010 , y)

Now, slope of AB = Slope of BC

⇒

⇒ y= 7.5 +97 = 104.5

Thus the slope of the line AB is 1/2, while in the year 2010 the population must be 104.5 crores.