Direct Variation

Common Core State Standards

7.RP.2   Recognize and represent proportional relationships between quantities.

7.RP.2a Decide whether two quantities are in a proportional relationship, e.g., by testing for equivalent ratios in a table or graphing on a coordinate plane and observing whether the graph is a straight line through the origin.

7.RP.2b Identify the constant of proportionality (unit rate) in tables, graphs, equations, diagrams, and verbal descriptions of proportional relationships.

Essential Question How can you determine if a linear function is a direct variation from an equation

Objective use direct variation to solve problems

Lesson Vocabulary

direct variation

constant of variation

constant of proportionality