Concept explainers
In Exercises 67-70, use technology to find the exponential regression function through the given points. (Round all coefficients to four decimal places.) [HINT: See Example 6.)
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Chapter 2 Solutions
Finite Mathematics and Applied Calculus (MindTap Course List)
- Life Expectancy The following table shows the average life expectancy, in years, of a child born in the given year42 Life expectancy 2005 77.6 2007 78.1 2009 78.5 2011 78.7 2013 78.8 a. Find the equation of the regression line, and explain the meaning of its slope. b. Plot the data points and the regression line. c. Explain in practical terms the meaning of the slope of the regression line. d. Based on the trend of the regression line, what do you predict as the life expectancy of a child born in 2019? e. Based on the trend of the regression line, what do you predict as the life expectancy of a child born in 1580?2300arrow_forwardWriting Look back at theorem 4.19 and rephrase it in terms of what learned in this chapter.arrow_forwardI need help with this questionarrow_forward
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- Use the data to develop a regression equationthat could be used to predict the quantity of pork sold during future periods. Discuss how you can tell whether heteroscedasticity, autocorrelation, or multi-collinearity might be a problem.arrow_forwardDetermine the regression equation X 1 2 3 4 7 8 y 0,5 0,8 1,2 1,9 3 4,8 7,5 11,9arrow_forwardThe table below shows the profit, P(x), in dollars, from selling & items. I 1 2 3 6 9 14 P(x) 104.9 124 133.3 102.4 -16.7 -411.2 Using WolframAlpha to do a quadratic regression, express the profit as a function of the number of items sold. P(x) = Round all numbers to 1 decimal place.arrow_forward
- The regression model y = 5.5(1.025)* represents the number of items sold in millions (y) by a company each year (x) after 2010. Select all of the appropriate statements that apply to the model. O The number of items sold each year grows by 2.5%. O There were originally 550,000 items sold. O There were approximately 4.3 million items sold in 2000. O There will be approximately 7 million items sold in 2020. O There will be approximately 8 million items sold in 2030.arrow_forwardHelp mearrow_forwardThe regression model for the number of diseases y = 0.4x2 – 2.5x +7.2 represents the number of flu cases (y) in a town in the thousands in x years after 2010. The model shows a(n) first followed by a(n) in the number of flu cases. The year had the greatest number of cases of the flu.arrow_forward
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