CHAPTER 5 Review

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 is constant.

Front

What does unit rate mean?

Back

Unit rate is the ratio of two measurements in which the second term is 1. It shows how much of one quantity corresponds to one unit of another quantity.

Front

How do you find the unit rate from a given distance and time?

Back

To find the unit rate, divide the total time by the total distance. For example, if a person runs 13 miles in 136.5 minutes, the unit rate is 136.5 minutes / 13 miles = 10.5 minutes per mile.

Front

What is the formula for finding a proportional relationship from a table?

Back

The formula for a proportional relationship is y = kx, where k is the constant of proportionality.

Front

How do you determine if two quantities are proportional?

Back

Two quantities are proportional if they have a constant ratio or unit rate.

Front

What is the ratio of sugar to flour if you use 1/2 cup of sugar with 3 cups of flour?

Back

The ratio of sugar to flour is 1/2 : 3, which simplifies to 1/6.

Front

What does it mean if a ratio is not constant?

Back

If a ratio is not constant, it means that the relationship between the two quantities is not proportional.

Front

How can you solve for a variable in a proportion?

Back

To solve for a variable in a proportion, cross-multiply and then isolate the variable.

Front

What is the constant of proportionality in the equation y = 5x?

Back

The constant of proportionality in the equation y = 5x is 5.

Front

If a person runs 13 miles in 136.5 minutes, what is their unit rate in minutes per mile?

Back

The unit rate is 10.5 minutes per mile.