Ratios Unit Review

Front

What is a ratio?

Back

A ratio is a comparison of two quantities, showing how many times one value contains or is contained within the other.

Front

How do you express a ratio?

Back

Ratios can be expressed in three ways: as a fraction (1/3), with a colon (1:3), or in words (1 to 3).

Front

What does it mean if a ratio is in simplest form?

Back

A ratio is in simplest form when the two numbers have no common factors other than 1.

Front

If the ratio of triangles to stars is 1 to 3, how many stars are there for every triangle?

Back

For every triangle, there are 3 stars.

Front

What is a proportional relationship?

Back

A proportional relationship is a relationship between two quantities where the ratio between them remains constant.

Front

How can you determine if a set of ordered pairs represents a proportional relationship?

Back

You can determine if a set of ordered pairs represents a proportional relationship by checking if the ratios of the corresponding values are equal.

Front

If a graph shows a straight line through the origin, what does that indicate?

Back

It indicates a proportional relationship between the two variables.

Front

How do you find the constant of proportionality?

Back

The constant of proportionality can be found by dividing one quantity by the other in a proportional relationship.

Front

If it takes 7.5 hours to pack 90 boxes, how long will it take to pack 45 boxes?

Back

It will take 3.75 hours to pack 45 boxes.

Front

What is the ratio of purple marbles to yellow marbles if there are 54 purple and 24 yellow marbles?

Back

The ratio of purple marbles to yellow marbles is 54:24, which simplifies to 9:4.