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The following bar graph shows the approximate number of millionaires in the United States for selected years. (See Example 6 in this section.)
A bar graph with 7 bars has the horizontal axis labeled "Year" and the vertical axis labeled "Millionaires (in Millions)". The bar labels followed by their heights are listed:(a)
Between which two years did the number of millionaires increase the least?
2014 and 20152015 and 2016 2016 and 20172017 and 20182018 and 20192019 and 2020
(b)
Between which two years did the number of millionaires increase the most?
2014 and 20152015 and 2016 2016 and 20172017 and 20182018 and 20192019 and 2020
(a)
Which of the following scatter diagrams suggests a nearly perfect positive linear correlation between the x and y variables?
(b)
Which of the following scatter diagrams suggests little or no linear correlation between the x and y variables?