Students find the amount of water wasted due to a leaky faucet as a result of designing and carrying out their own experiments that model this common, real-world situation. Graphing their data, students are then able to write an equation for the line of best fit. This equation, in turn, allows them to make predictions concerning the amount of water wasted over a long period of time or the amount wasted by multiple leaks.
Monk-George, Stephanie, "How Does a Little Add Up to a Lot?" (2003). Lesson Plans. 210.