Of the three styles identified _tie-die, splat, and ombre), which, if any, is a trend (i.e.g an enduring change in style) rather than a fad (i.e. a short-term craze)? And what type of analysis should be carried out to answer this question?

Trend or a Fad?

Of the three styles identified _tie-die, splat, and ombre), which, if any, is a trend (i.e.g an enduring change in style) rather than a fad (i.e. a short-term craze)? And what type of analysis should be carried out to answer this question?