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 quantity is constant.

Front

What is the constant of proportionality in the equation y=5x?

Back

5

Front

If Neveah pays $21 for 19 hours of parking, what is the hourly rate?

Back

The hourly rate is $21/19.

Front

What equation represents the total cost of parking for x hours if the hourly rate is $21/19?

Back

y=(21/19)x

Front

How do you find the constant of proportionality from a ratio?

Back

Divide one quantity by the other quantity.

Front

If there are 3 cans that store 9 tennis balls, what is the constant of proportionality?

Back

3 (because 9 tennis balls / 3 cans = 3 tennis balls per can).

Front

What does it mean if a graph represents a proportional relationship?

Back

It means that the graph is a straight line that passes through the origin.

Front

What does the coordinate (4,2) represent in a proportional relationship?

Back

2 cups of sugar for 4 jam jars.

Front

How can you tell if two quantities are proportional?

Back

If the ratio of the two quantities is constant.

Front

What is the formula for a proportional relationship?

Back

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