Unit 3 Review: Ratios, Rates, Unit Rates, Tape Diagrams, Graphs

Front

What is a ratio?

Back

A ratio is a comparison of two quantities that shows the relative size of one quantity to another, often expressed as 'a to b' or a:b.

Front

What is a unit rate?

Back

A unit rate is a ratio that compares a quantity to one unit of another quantity, often expressed as 'x per 1 unit'.

Front

How do you find the unit rate of a total cost for multiple items?

Back

To find the unit rate, divide the total cost by the number of items. For example, if 15 pizzas cost $97.50, the unit rate is $97.50 ÷ 15 = $6.50 per pizza.

Front

What is the unit rate of 120 customers in 8 hours?

Back

The unit rate is 120 customers ÷ 8 hours = 15 customers per hour.

Front

What does a tape diagram represent?

Back

A tape diagram is a visual model that uses rectangles to represent quantities and their relationships, helping to solve ratio and proportion problems.

Front

If the ratio of girls to boys is 3:8 and there are 48 boys, how many girls are there?

Back

To find the number of girls, set up the proportion: 3/8 = x/48. Solving gives x = 18 girls.

Front

What is a rate?

Back

A rate is a specific kind of ratio that compares two different kinds of quantities, such as speed (miles per hour) or price (cost per item).

Front

How do you complete a ratio table?

Back

To complete a ratio table, identify the relationship between the quantities and use multiplication or division to find missing values.

Front

What is the cost of 7 apps if each app costs $3?

Back

The cost of 7 apps is 7 × $3 = $21.

Front

What is the formula to calculate unit rate?

Back

Unit Rate = Total Quantity ÷ Number of Units.