Ratios/Proportions Test 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

What is a proportion?

Back

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

Front

How do you determine if a relationship is proportional?

Back

A relationship is proportional if it can be represented by a straight line that passes through the origin (0,0).

Front

What is the unit rate?

Back

The unit rate is the ratio of a quantity to one unit of another quantity, often expressed as 'per' something.

Front

If you buy 10 apples for $5, what is the unit rate in dollars per apple?

Back

$0.50 per apple.

Front

What does it mean if a graph does not pass through the origin?

Back

If a graph does not pass through the origin, it indicates that the relationship is not proportional.

Front

What is the constant of proportionality?

Back

The constant of proportionality is the constant value (k) that relates two proportional quantities, often found by dividing one quantity by the other.

Front

If the ratio of boys to girls in a class is 2:3, how many boys are there if there are 15 girls?

Back

There are 10 boys.

Front

What is the formula to find a missing value in a proportion?

Back

If a/b = c/d, then ad = bc.

Front

How can you tell if a table represents a proportional relationship?

Back

A table represents a proportional relationship if the ratios of corresponding values are constant.