Examples
Example: A graph has a line that goes through the origin and the point (5,2). This represents a proportional relationship and the constant of proportionality is
Example: Gina works as a babysitter and earns $9 per hour. She can only work 6 hours this week. Gina wants to know how much money she will make. Gina can use the equation e=9h, where e is the amount of money earned, h is the number of hours worked and 9 is the constant of proportionality.
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Formative Assessments
Tutorial
MFAS Formative Assessments
Students are given a graph that models the hourly earnings of a babysitter and are asked to interpret ordered pairs in context.
Students are asked to identify and explain the constant of proportionality given a verbal description and a diagram representing a proportional relationship.
Students are asked to determine the constant of proportionality using a table and a graph.
Students are asked to identify and explain the constant of proportionality in three different equations.
Student Resources
Tutorial
This video shows how to recognize and understand graphs of proportional relationships to find the constant of proportionality.
Type: Tutorial