The number of Burger King restaurants worldwide in 2012 was

The number of Burger King restaurants worldwide in 2012 was 35, 752. In 2007, there were 34, 561 Burger King restaurants worldwide. Let y be the number of Burger King restaurants in the year x. where x = 0 represents the year 2007. Write a linear equation that models the growth in the number of Burger King restaurants worldwide in terms of x. Use this equation to predict the number of Burger King restaurants worldwide in the year 2014. Explain what the slope for this line means in the context of the problem.

Solution

a)
slope = (35752-34561)/(5-0)
= 238.2

Now eqn will ne:
y-34561 = slope (x-0)
y = 238.2x + 34561

b)
put x=7
y = 238.2*7 + 34561
=36228.4
Answer: 36228.4

c)
slope means increase of number of restaurant per year