The author presents an activity in which the lines in students' hands are analyzed, with curves and lines fit to each one.

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Contributor Notes

John F. Mahoney, johnf.mahoney@gmail.com, teaches mathematics at Benjamin Banneker Academic High School, a public school in Washington, D.C. He was inducted into the National Teachers Hall of Fame in 2005.

(Corresponding author is Mahoney johnf.mahoney@gmail.com)
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