Youth-to-adult unemployment rate ratio. The ILO’s concern about employment status of youth worldwide is based not only on the development of youth unemployment itself, but also the unfavorable...

Youth-to-adult unemployment rate ratio. The ILO’s concern about employment status of youth worldwide is based not only on the development of youth unemployment itself, but also the unfavorable comparison to the development in adult unemployment. In order to compare both unemployment rates, ILO use the youth-to-adult ratio of unemployment rate over time.

Which graphical display seems the more appropriate for these data? Explain.