Proportions

Front

What is a proportion?

Back

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

Front

How can you determine if two ratios form a proportion?

Back

Two ratios form a proportion if the cross products are equal.

Front

What does it mean for a graph to be proportional?

Back

A graph is proportional if it passes through the origin and has a constant rate of change.

Front

What is the constant of proportionality?

Back

The constant of proportionality is the ratio between two proportional quantities.

Front

If 2/3 = x/9, what is x?

Back

x = 6.

Front

What is the relationship between proportionality and linear functions?

Back

Proportional relationships can be represented by linear functions that pass through the origin.

Front

What is an example of a proportional relationship in real life?

Back

The relationship between distance and time when traveling at a constant speed.

Front

What does it mean if a graph is non-proportional?

Back

A non-proportional graph does not pass through the origin and does not have a constant rate of change.

Front

If the ratio of boys to girls in a class is 3:4, what is the proportion if there are 12 boys?

Back

There are 16 girls, making the ratio 3:4.

Front

What is the formula for finding the constant of proportionality?

Back

k = y/x, where k is the constant of proportionality.