Proportional Relationships

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 is constant.

Front

What does the equation y = kx represent?

Back

The equation y = kx represents a proportional relationship where k is the constant of proportionality.

Front

How do you find the constant of proportionality in a table of values?

Back

To find the constant of proportionality, divide the value of y by the corresponding value of x for any pair of values in the table.

Front

What is the unit rate?

Back

The unit rate is a comparison of two different quantities when they are combined together, expressed as a quantity per one unit of another quantity.

Front

If 30 laps are completed in 10 minutes, what is the unit rate?

Back

3 laps per minute.

Front

Evan bought 5 pounds of bananas for $10. What is the price per pound?

Back

$2 per pound.

Front

Christy bought 6 pounds of bananas for $9. What is the price per pound?

Back

$1.50 per pound.

Front

Who got the better deal: Evan or Christy?

Back

Christy got the better deal.

Front

What is the constant of proportionality if y = 3x?

Back

The constant of proportionality is k = 3.

Front

If y = 1/5x, what is the constant of proportionality?

Back

The constant of proportionality is k = 1/5.