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Instructor Overview

Lesson Overview

Students calculate the constant of proportionality for a proportional relationship based on a table of values and use it to write a formula that represents the proportional relationship.

Key Concepts

If two quantities are proportional to one another, the relationship between them can be defined by a formula of the form y = kx, where k is the constant ratio of y-values to corresponding x-values. The same relationship can also be defined by the formula x=(1k)y , where 1k is now the constant ratio of x-values to y-values.

Goals and Learning Objectives

  • Define the constant of proportionality.
  • Calculate the constant of proportionality from a table of values.
  • Write a formula using the constant of proportionality.