Answer to Question #258676 in Economics for piash

Question

The worldwide consumption of cigarettes increased from 2.5 trillion in 1960 to 4 trillion in 1980.Let y be the consumption of cigarettes (in trillion) x years after 1940. In what year will the consumption reach 5.5 trillion. (Assume that the data can be approximated fairly closely by a straight line. Use the given information to find the equation of the line)

 

Answer 1

Cigarette consumption grew at a rate (4-2.5)/20=0.075 trillion per year.

Cigarette consumption of 5.5 trillions per year will be reached in 1960 + ( (5.5-4)/0.075) = 1980