Concept explainers
Social Website Popularity: Twitter The following table shows the popularity of Twitter among social media sites as rated by StatCounter.com:36
Year t (year since start of 2008) | 2 | 4 | 5 |
Twitter Popularity
|
6 | 6 | 7 |
Which of the following kinds of models would best fit the given data? Explain your choice of model. (A, a, b, c, and m are constants.)
(A)
(B)
(C)
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Applied Calculus
- Using your graphing calculator, make a scatter plot of the data from the table. Then graph your model from Question 2 along with the data. How well does your model fit the data? What could you do to try to improve your model?arrow_forwardLife 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_forwardTable 6 shows the year and the number ofpeople unemployed in a particular city for several years. Determine whether the trend appears linear. If so, and assuming the trend continues, in what year will the number of unemployed reach 5 people?arrow_forward
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