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 is constant.

Front

How do you find the unit rate?

Back

To find the unit rate, divide the total quantity by the number of units. For example, if there are 405 rotations in 5 minutes, the unit rate is 405 ÷ 5 = 81 rotations per minute.

Front

What does it mean if a graph is proportional?

Back

A graph is proportional if it passes through the origin (0,0) and forms a straight line.

Front

How can you tell if a table represents a proportional relationship?

Back

A table represents a proportional relationship if the ratios of the corresponding values are constant.

Front

What is the formula to find the constant of proportionality (k)?

Back

The constant of proportionality (k) can be found using the formula k = y/x.

Front

What does the point (2, 94) represent in a proportional relationship?

Back

The point (2, 94) represents that after 2 weeks, they save $94.

Front

What is the unit rate of 150 miles in 3 hours?

Back

The unit rate is 150 ÷ 3 = 50 miles per hour.

Front

If y = kx, what does k represent?

Back

In the equation y = kx, k represents the constant of proportionality.

Front

What is an example of a proportional relationship in real life?

Back

An example of a proportional relationship is the cost of apples if they are sold at a constant price per pound.

Front

How do you determine if two ratios are proportional?

Back

Two ratios are proportional if their cross products are equal.