**Unit 5: Proportional Reasoning and Slope**

** This unit should take approximately 11 instructional days**

** This unit should take approximately 11 instructional days**

Students will understand that…

- Similar figures have congruent angles and proportional side lengths
- It is possible to find actual measurements when given a scale drawing or model
- The terms unit rate and constant of proportionality are interchangeable
- The constant of proportionality can be identified in a table or on a graph
- Proportions can be used to solve for a missing value in a ratio
- Similar triangles can be used to identify the constant of proportionality or the slope of a line
- There are positive, negative, undefined, and zero slopes
- The form y=mx+b can be used to model any linear function

Essential Vocabulary: