Math 6/7 Unit 4 test 1 Review

Front

What is a ratio?

Back

A ratio is a comparison of two quantities by division, showing how many times one value contains or is contained within the other.

Front

How do you determine if two ratios are proportional?

Back

Two ratios are proportional if they can be expressed as equivalent fractions, meaning their cross products are equal.

Front

If a recipe requires 5 cups of flour for 3 people, how much flour is needed for 9 people?

Back

15 cups of flour.

Front

What is the formula to find the unit rate?

Back

The unit rate is found by dividing the quantity by the number of units, expressed as 'quantity per unit'.

Front

If Justin can type 408 words in 4 minutes, how do you find his typing speed in words per minute?

Back

Divide the total words by the total minutes: 408 words ÷ 4 minutes = 102 words per minute.

Front

What is the relationship between direct variation and proportionality?

Back

Direct variation means that two quantities increase or decrease together at a constant rate, which is the definition of proportionality.

Front

How do you set up a proportion to solve for an unknown?

Back

Set up a fraction equal to another fraction, cross-multiply, and solve for the unknown.

Front

What is the meaning of 'scaling up' in ratios?

Back

Scaling up means increasing both quantities in a ratio by the same factor to maintain the same relationship.

Front

If a 6-ounce package contains 27 pieces, how many pieces are in a 10-ounce package?

Back

45 pieces.

Front

What is a unit rate?

Back

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