7th Grade - Proportional Relationships - Lesson 1 & 2

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 does the constant of proportionality (k) represent in the equation y = kx?

Back

The constant of proportionality (k) represents the constant rate of change between the two variables x and y.

Front

If a car travels 120 miles in 2 hours, what is its speed in miles per hour?

Back

60 miles per hour.

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 of one.

Front

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

Back

Divide the y-value by the corresponding x-value for any pair of values in the table.

Front

If y = 3x, what is the constant of proportionality?

Back

3.

Front

What is the equation of a proportional relationship?

Back

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

Front

If a recipe requires 2 cups of flour for every 3 cups of sugar, what is the ratio of flour to sugar?

Back

2:3.

Front

What does it mean for a table to be proportional?

Back

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

Front

If a person can paint 5 walls in 2 hours, how many walls can they paint in 1 hour?

Back

2.5 walls.