Concept explainers
Social Networking The data in the table below represent the percent of U.S. citizens aged 12 and older who have a profile on at least one social network.
(a) Using a graphing utility, draw a
(b) Using a graphing utility, build a logarithmic model from the data.
(c) Graph the logarithmic function found in part (b) on the scatter diagram.
(d) Use the model to predict the percent of U.S. citizens on social networking sites in 2015.
(e) Use the model to predict the year in which of U.S. citizens will be on social networking sites.
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Precalculus: Concepts Through Functions, A Unit Circle Approach to Trigonometry (4th Edition)
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