Chapter 4.4, Problem 3GP

To determine

To estimate: The revenue in 2030, using the line of fit for the data in Guided Practice 2.

Answer to Problem 3GP

So, the revenue in 2030 is 222.144 billion.

Explanation of Solution

Given information: The table shows revenue in billion for fast food restaurants by year.

  

Calculation:

Let x be the years from 2004 and y be the revenue(sales)in billion ,So above table is written as.

Year x	0	1	2	3	4	5	6	7	8
Sales(revenue in billion)	172.10	180.58	189.54	186.5	184.77	178.59	183.99	190.25	195.19

By using best of line fit calculator on above data the equation of best line fit is.

  $y=1.706x+\mathrm{177.788222.}$

For estimate revenue in 2030 put x= 2030-2004=26 in equation of best fit

  $y=1.706\times 26+177.788222=44.356+177.788222=222.144222$ .

So, the revenue in 2030 is 222.144 billion.