Unit 2, Lesson 10
Introducing Graphs of Proportional Relationships
Grade 7
Preparation
Lesson Narrative
This lesson introduces an important way of representing a proportional relationship: its graph. Students plot points on the graph from tables, and, by the end of the lesson, start to see that the graph of a proportional relationship always lies on a line that passes through the origin,
- Compare and contrast (orally) graphs of relationships.
- Generalize (orally and in writing) that a proportional relationship can be represented in the coordinate plane by a line that includes the “origin” or by a collection of points that lie on such a line.
- Justify (orally) that a table and a graph represent the same relationship.
Let’s see how graphs of proportional relationships differ from graphs of other relationships.
Required Preparation
Activity 1
For the digital version of the activity, acquire devices that can run the applet.
Activity 2
For the digital version of the activity, acquire devices that can run the applet.
Activity 3
Prepare copies of the answer key from the Blackline Master and place them in envelopes for students to access to check their work when they finish.
origin
The origin is the point