The set of years in which Apple iPhone unit sales were less than 200 million.

Use the following graph, created using Stat Crunch, which shows the worldwide sales of the Apple iPhone, in millions of units, for the years 2011–2018. Let the 8 years be the universal set.

Use the graph to determine each set in roster form.

Transcribed Image Text:

Unit Sales of the Apple iPhone Worldwide 250 231 212 217 218 200 169 150 150 125 100 72 50 2011 2012 2013 2014 2015 2016 2017 2018 Year Sales (millions of units)