Task# Find the Change

Illustrative MathematicsVaries

This task is adapted from one I have used with my eighth grade students to help them solidify their understanding of linear functions and push them to be more fluent in their reasoning about slope and -intercepts. This task has also produced a reasonable starting place for discussing point-slope form of a linear equation. With some instructional effort, this task can produce some nice classroom discussion. If adapted slightly (see comments in the solution), the task could be used as an assessment if placed properly in the curriculum.