Week 18~Math Bridges (Proportional Relationships)

Front

What is a proportional relationship?

Back

A proportional relationship is a relationship between two quantities where the ratio of one quantity to the other quantity is constant.

Front

What is the equation of a proportional relationship?

Back

The equation of a proportional relationship can be expressed as y = kx, where k is the constant of proportionality.

Front

If an app developer earns $230 for every 100 apps downloaded, what is the equation representing the relationship between apps (x) and earnings (y)?

Back

y = 2.30x

Front

Which of the following represents a proportional relationship: A cheeseburger costs $7.95 plus $1.00 for each topping, or a pool fills at 90 gallons per hour?

Back

A pool fills at a rate of 90 gallons per hour.

Front

If the x-value increases by 20 and the y-value increases by 10, what is the slope of the relationship?

Back

The slope is 0.5.

Front

Back

Front

Back

Front

What is the constant of proportionality in the equation y = 2.30x?

Back

The constant of proportionality is 2.30.

Front

How do you determine if a relationship is proportional?

Back

A relationship is proportional if it can be represented by a straight line through the origin on a graph.

Front

What does the slope of a line represent in a proportional relationship?

Back

The slope represents the rate of change between the two quantities.