Practice Review

Front

What does it mean for two quantities to be proportional?

Back

Two quantities are proportional if they maintain a constant ratio to each other. This means that as one quantity increases or decreases, the other does so in a consistent manner.

Front

What is the definition of 'Not Proportional'?

Back

Not proportional means that two quantities do not maintain a constant ratio. Changes in one quantity do not result in consistent changes in the other.

Front

If a pizza has 8 slices and costs $12, how much does each slice cost?

Back

$1.50

Front

What is the formula to determine if two quantities are proportional?

Back

To determine if two quantities are proportional, you can use the formula: k = y/x, where k is the constant of proportionality.

Front

What is a constant of proportionality?

Back

The constant of proportionality is the constant value (k) that relates two proportional quantities. It is the ratio of one quantity to the other.

Front

How can you tell if a graph represents proportional relationships?

Back

A graph represents proportional relationships if it is a straight line that passes through the origin (0,0).

Front

What is an example of proportional quantities in real life?

Back

An example of proportional quantities is the relationship between distance and time when traveling at a constant speed.

Front

What is the difference between direct and inverse proportionality?

Back

Direct proportionality means that as one quantity increases, the other also increases. Inverse proportionality means that as one quantity increases, the other decreases.

Front

If a recipe calls for 2 cups of flour for 4 servings, how much flour is needed for 10 servings?

Back

5 cups of flour (using the ratio 2 cups/4 servings = x cups/10 servings).

Front

What is a unit rate?

Back

A unit rate is a comparison of two different quantities when they are combined together. It is often expressed as a quantity per one unit of another quantity.