How has the human population changed over time? Students build an exponential model for population growth, and use it to make predictions about the future of our planet.
How has the urban population changed over time, and will we all eventually live in cities? Students use recursive rules along with linear and exponential models to explore how America's urban areas have been growing over the last 200 years.
How has the iPod depreciated over time? Students compare linear and exponential decay, as well as explore how various products have depreciated and what might account for those differences.
How much can you trust your memory? Students construct and compare linear and exponential models to explore how much a memory degrades each time it's remembered.