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Calculus: An Applied Approach (Min...

10th Edition
Ron Larson
ISBN: 9781305860919

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Calculus: An Applied Approach (Min...

10th Edition
Ron Larson
ISBN: 9781305860919
Textbook Problem
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Revenue The table gives the revenues y (in billions of dollars) for Costco Wholesale from 2009 through 2014. (Source: Costco Wholesale Corporation)

Year 2009 2010 2011
Revenue, y 71.4 77.9 88.9
Year 2012 2013 2014
Revenue, y 99.1 105.2 112.6

Spreadsheet at LarsonAppliedCalculus.com

(a) Use the regression capabilities of a graphing utility or a spreadsheet to find the least squares regression line for the data. Let t = 9 represent 2009.

(b) Estimate the revenue in 2017.

(c) In what year will the revenue reach $180 billion?

(a)

To determine

To calculate: The least squares regression line for the given data.

Explanation

Given Information:

Regression tabel is given gives the revenues (in billion of dollar)from 2009 to 2014.

year 2009 2010 2011 2012 2013 2014
Revenue, y 71.4 77.9 88.9 99.1 105.2 112.6

Calculation:

Consider the provided points:

(9,71.4)(10,77.9)(11,88.9)(12,99.1)(13,105.2)(14,112.6)

Use Ti-83 to find the equation.

Step 1: Press the ON key.

Step 2: Press the STAT key.

Step 3: Now press ENTER key.

Step 4: Now take 2009 as 9, 2010 as 10 and so on.

Now put the values of years under L1 and values of revenue under L2.

L1L2971

(b)

To determine

To calculate: The estimate revenue in 2017.

(c)

To determine

To calculate: In which year will the revenue reach $180 dollar.

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