[size=150][i][b]Andrei drives a 60 mile course in 1 hour. How fast does he have to drive a second lap in order to average 120 miles per hour for the two laps?[/b][/i][/size][br][br]The left panel shows the given data in the {time, distance} plane.[br]The right panel shows the given data in the {time, speed} plane.[br][br]You can explore the problem by dragging the YELLOW DOT in the left hand panel.[br][br]- How are speeds represented in the left panel?[br]- How are distances represented in the right panel?[br]- Which representation do you think provides you with more insight? Why?[br][br][color=#ff0000][i][b]- How can you use this applet to generate more problems of this sort?[br][br]- What questions could/would you ask your students? [br][br]- What have you learned about word problems from this applet?[/b][/i][/color]