Constant of Proportionality

My Definition

Key Characteristics

The following are true of the constant of proportionality:

- It is represented symbolically by the variable
*k*. - It describes the constant ratio of two proportional quantities, usually represented with
*x*and*y*such as*k*=.*y**x* - It is also known as constant of variation or unit rate.
- It describes the constant rate of change between two quantities in a proportional relationship.
- It represents the slope of the line of a graphed proportional relationship where
*x*represents the independent variable and*y*represents the dependent variable.

Example

Video Transcript (PDF)

Use the link below to further study examples of Constant of Proportionality.

Constant of Proportionality Activity

Non-example

In the equation *y* = 3*x* - 4, three is the slope in a non-proportional situation.

TEKS: 7(4)(C), 8(5)(E)