Graphing 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?

Back

The constant of proportionality is the constant value (k) that relates two proportional quantities, expressed as y = kx.

Front

If an object weighs 12 pounds on Earth, how much does it weigh on the moon?

Back

2 pounds.

Front

Does this table show a proportion?

Back

No, the table is not a proportion.

Front

If you use water for 3 minutes, how many gallons were used if the rate is 5 gallons per minute?

Back

15 gallons.

Front

If you hike for 5 hours at a speed of 1.2 miles per hour, how many miles do you travel?

Back

6 miles.

Front

What is the formula to find the constant of proportionality?

Back

k = y/x, where y is the dependent variable and x is the independent variable.

Front

How do you determine if two ratios are proportional?

Back

Two ratios are proportional if their cross products are equal.

Front

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

Back

The relationship between distance and time when traveling at a constant speed.

Front

If a recipe calls for 2 cups of flour for 4 servings, how much flour is needed for 10 servings?

Back

5 cups of flour.