Finding Equations of Parallel and Perpendicular Lines

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In case you are trying the MARS MAP Classroom Challenges for the first time, it is recommended that you read the Brief Guide for teachers and administrators before you get started.
Before the lesson, students work individually on a task designed to reveal their current levels of understanding and their difficulties. You then review their work, and create questions for students to answer in order to improve their solutions.
During the lesson, students work in small groups on a task related to the assessment task. Next, they re-group to critique each other's work. Throughout this work they justify and explain their decisions to each other.
In a whole-class discussion, students explain and extend their methods and solutions.
Finally, students again work individually to improve their solutions to the assessment task.
Additional resources for this lesson include: parallel_perpendicular_lines_slides_beta.ppt

To help you assess how well students are able to understand the relationship between the slopes of parallel and perpendicular lines.
To help identify students who find it difficult to find, from their equations, lines that are parallel and perpendicular.
To help identify students who find it difficult to identify and use intercepts.
It also aims to encourage discussion on some common misconceptions about equations of lines.