This Instructional Activity is a part of the Lesson 13, Unit 4, Grade 8. In this activity, one of the main purposes is to notice what is common among systems with the same number of solutions. Therefore, it may be useful to ask students to justify why the lines graphed with no obvious intersections are actually parallel. Support for Students with Disabilities Conceptual Processing: Processing Time. Check in with individual students, as needed, to assess for comprehension during each step of the activity. Student-Facing Task Statement Your teacher will give you a page with some systems of equations.