Instructional Activity# Writing Relationships from Slope Triangles

Lesson 11. Unit 2. Grade 8 Open Up Resources

Open Up Resources15 min(s)

This Instructional Activity is a part of the Lesson 11, Unit 2, Grade 8. In this activity, students find a rule to determine if a point (x,y) lies on a line no longer containing (0,0). Proportional reasoning based on the graph of the line, which could be applied to the line in the previous activity, no longer applies here. Like in the previous activity, students are using the structure of a line and properties of similar triangles to investigate these rules relating coordinates of points on the line.