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 determine the constant of proportionality in a proportional relationship?

Back

The constant of proportionality can be determined by dividing one quantity by the other quantity in the relationship.

Front

If 16 hot dogs are sold each minute, how do you calculate the total sold in a given time?

Back

Multiply the rate of hot dogs sold per minute (16) by the number of minutes (30) to find the total: 16 * 30 = 480.

Front

What is the formula to find the unit rate?

Back

The unit rate can be found by dividing the total quantity by the total time or total number of items.

Front

In a ratio of 2 M&Ms to 10 raisins, how do you find the total number of raisins if you have 18 M&Ms?

Back

Set up a proportion: 2/10 = 18/x, then cross-multiply and solve for x to find the number of raisins.

Front

How do you solve for an unknown in a proportional relationship?

Back

Use cross-multiplication to set up an equation and solve for the unknown.

Front

What is the relationship between boys and girls in the 7th grade if there are 3 boys for every 5 girls?

Back

The ratio of boys to girls is 3:5, meaning for every 3 boys, there are 5 girls.

Front

How do you calculate the total cost of items when given a unit price?

Back

Multiply the unit price by the number of items to find the total cost.

Front

If you can buy 3 cookies for $2.00, what is the cost per cookie?

Back

The cost per cookie is $2.00 divided by 3, which is approximately $0.67.

Front

What is a ratio?

Back

A ratio is a comparison of two quantities that shows the relative size of one quantity to another.