Final Proportional Reasoning Review

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 determine if a graph is proportional?

Back

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

Front

What is the formula to calculate percent of change?

Back

Percent of change = (New Value - Old Value) / Old Value x 100%.

Front

If a class has 35 students and increases to 42, what is the percent of change?

Back

20%.

Front

What does a scale of 1 cm to 5 m mean in a scale drawing?

Back

It means that every 1 cm on the drawing represents 5 meters in real life.

Front

If a fence in a scale drawing measures 30 cm, what is the actual perimeter?

Back

150 m (30 cm x 5 m/cm).

Front

What is the constant of proportionality?

Back

The constant of proportionality is the ratio of one quantity to another in a proportional relationship.

Front

If Craig earns $37 for 4 hours, what is his hourly rate?

Back

$9.25 per hour.

Front

How is sales tax applied to the price of an item?

Back

Sales tax is added to the price of an item.

Front

What is the difference between proportional and non-proportional relationships?

Back

Proportional relationships have a constant ratio, while non-proportional relationships do not.