Proportional Relationships

Front

What is the equation for a proportional relationship?

Back

y = kx, where k is the constant of proportionality.

Front

What does the constant k represent in the equation y = kx?

Back

The constant of proportionality.

Front

What is a unit rate?

Back

A unit rate describes how many units of the first type of quantity corresponds to one unit of the second type of quantity.

Front

What does it mean if an equation shows proportionality?

Back

It means that the relationship between the two variables can be expressed as y = kx.

Front

What is the graph of a proportional relationship?

Back

A straight line that passes through the origin.

Front

If y = 3x, what is the value of k?

Back

k = 3.

Front

How can you determine if two quantities are proportional?

Back

If the ratio of the two quantities is constant.

Front

What is a ratio?

Back

A comparison of two quantities by division.

Front

What is a proportion?

Back

An equation that states that two ratios are equal.

Front

If the unit rate of a car's speed is 60 miles per hour, how far will it travel in 3 hours?

Back

180 miles.