Proportional Relationships

Front

What is a proportional relationship?

Back

A relationship between two quantities where the ratio of one quantity to the other is constant.

Front

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

Back

The graph is a straight line that passes through the origin (0,0).

Front

What is the unit rate?

Back

The unit rate is the ratio of two measurements in which the second measurement is 1.

Front

How can you identify a proportional relationship in a table?

Back

If the ratios of corresponding values are constant, the relationship is proportional.

Front

What is the constant of proportionality?

Back

The constant of proportionality is the factor by which one quantity is multiplied to get the other in a proportional relationship.

Front

If the constant of proportionality is 5, what is the proportional equation?

Back

y = 5x.

Front

What does the slope of a line represent in a proportional relationship?

Back

The slope represents the constant of proportionality.

Front

How do you find the unit rate from a graph?

Back

Identify the change in the y-value over the change in the x-value between two points.

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 table shows values (2, 4), (3, 6), (4, 8), does it represent a proportional relationship?

Back

Yes, because the ratio of y to x is constant (2).