7th Grade Proportional Relationships

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 quantity is constant.

Front

How do you find the constant of proportionality?

Back

To find the constant of proportionality, divide one quantity by the other quantity in a proportional relationship.

Front

If Johnny read 280 pages in 4 hours, how many pages did he read per hour?

Back

70 pages per hour.

Front

In a bag of trail mix, if there are 2 M&Ms for every 10 raisins, how many raisins are in a bag with 18 M&Ms?

Back

90 raisins.

Front

What is the formula to calculate the price per item?

Back

Price per item = Total price / Number of items.

Front

If the Williams family bought 4 concert tickets for $252, what was the price per ticket?

Back

$63.00 per ticket.

Front

What does it mean for a table of values to be proportional?

Back

A table of values is proportional if the ratios of the corresponding values are constant.

Front

If a recipe calls for 2 cups of flour for every 3 cups of sugar, what is the constant of proportionality?

Back

The constant of proportionality is 2/3.

Front

How can you determine if two ratios are equivalent?

Back

Two ratios are equivalent if their cross products are equal.

Front

What is an example of a non-proportional relationship?

Back

A relationship where the ratio between two quantities changes, such as a fixed cost plus a variable cost.