Racing Dots

Remix of original so that I could look at how they created it and perhaps make small adjustments in wording. In this activity, students make predictions about where a pair of moving dots will meet. They gather more information to increase the accuracy of their predictions. Later, they write a system of two linear equations to model the path of the dots in order to make an even more precise calculation. While students can solve the systems of equations that arise here by graphing, the activity lends itself quite well to solving systems by substitution. This activity was inspired by Jon Orr's "The Great Collide" https://teacher.desmos.com/activitybuilder/custom/56ccbb40c1572a41064fcd78

By Karl Fisch