The print version allows teachers to use the problem with their students without giving the students access to the archived answers.
Teachers can use the link to the archived problem to get ideas of student thinking.
Marathon Graphing asks students to think about models of real-life linear relations, including world record times for the men's and women's marathon. Please email us. Students use the slider bars to create a line, and then press the line of least squares to test how well they have done. Students collect and analyze data by passing a hand squeeze around a circle. Details for this activity have been written by Cynthia Lanius in The Hand Squeeze Problem.