Proportional Relationships Quick 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 quantity is constant.

Front

How can you identify a proportional relationship from a graph?

Back

A graph represents a proportional relationship if it is a straight line that passes through the origin (0,0).

Front

What is the constant of proportionality?

Back

The constant of proportionality is the constant value (k) that relates two proportional quantities in the equation y = kx.

Front

What does it mean if a table of values is proportional?

Back

A table of values is proportional if the ratios of the corresponding values are equivalent.

Front

How do you find the unit rate from a recipe?

Back

To find the unit rate, divide the quantity of one ingredient by the quantity of another ingredient to express it per one unit.

Front

What is the unit rate of 1/4 cups of sugar per 1/3 cups of chocolate chips?

Back

The unit rate is 3/4 cups of sugar per cup of chocolate chips.

Front

What is the formula for a proportional relationship?

Back

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

Front

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

Back

A non-proportional relationship does not have a constant ratio between the two quantities, and its graph does not pass through the origin.

Front

How can you tell if an equation is proportional?

Back

An equation is proportional if it can be expressed in the form y = kx, where k is a constant.

Front

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

Back

An example of a proportional relationship is the cost of apples per pound; if apples cost $2 per pound, the cost is proportional to the weight.