This complete lesson includes a warm up, an activity, a closure, a formative assessment, and a homework assignment. The lesson should be assigned before students have studied key features of pairs of linear equations in two variables. This is an investigative assignment that will allow students to explore a system of linear equations. Also, students should be fluent enough using the graphing calculator to graph a system and set the window. Use of graphing technology would be appropriate way to complete the “How Can You Find Out?” portion of the activity. Students should have some knowledge of graphing a linear equation.
A.REI.6 Solve systems of linear equations exactly and approximately (e.g., with graphs), focusing on pairs of linear equations in two variables.