The Wall Street Journal on January 19, 2016, used a chart resembling the following one to illustrate the rising amounts that Netflix spends to provide streaming content online. Is this the bar chart of a categorical variable in the sense of this chapter, or is it a timeplot that uses bars to show the data?

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Costs for Streaming Content billions of dollars $12.00 $10.00 $8.00 $6.00 $4.00 $2.00 $0.00 2011 2013 2014 2015 2012