Ratio and proportions Practice

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

What is a proportion?

Back

A proportion is an equation that states that two ratios are equal.

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 'per'.

Front

How do you find the price per item?

Back

To find the price per item, divide the total cost by the number of items.

Front

What is the constant of proportionality?

Back

The constant of proportionality is the constant value (k) that relates two proportional quantities.

Front

If 4 basketballs cost $36, how do you calculate the cost per basketball?

Back

Divide the total cost ($36) by the number of basketballs (4) to get $9 per basketball.

Front

If Mike bought 4 pizzas for $68, what is the cost per pizza?

Back

Divide the total cost ($68) by the number of pizzas (4) to get $17 per pizza.

Front

What does it mean if a graph shows a proportional relationship?

Back

A graph shows a proportional relationship if it is a straight line that passes through the origin.

Front

How can you determine if two ratios are equivalent?

Back

Two ratios are equivalent if their cross products are equal.

Front

What is the formula for finding a unit rate?

Back

The formula for finding a unit rate is: Unit Rate = Total Quantity / Number of Units.