About This Lesson
Use patty paper for this activity. It is better to trace everything then ask student to place x+, y+ and x-, y- next to x-axis and y- axis on patty paper. This is an alternative way to ask students to make rule. For example, when they rotate over origin on patty paper ccw 90 degree, they can see +x axis rotate to y+ axis and y+ axis rotate to x- axis. The rule is made (x, y) -> (y, -x)
