7th Grade - Graphing Proportional Relationships - Review

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 is the equation of a proportional relationship?

Back

The equation of a proportional relationship can be written in the form y = kx, where k is the constant of proportionality.

Front

What does the constant of proportionality represent?

Back

The constant of proportionality represents the unit rate or the factor by which one quantity changes in relation to another.

Front

How do you determine if a relationship is proportional from a table?

Back

A relationship is proportional if the ratios of corresponding values (y/x) are constant.

Front

What is a unit rate?

Back

A 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 y = 5x, what is the constant of proportionality?

Back

The constant of proportionality is 5.

Front

What does a graph of a proportional relationship look like?

Back

A graph of a proportional relationship is a straight line that passes through the origin (0,0).

Front

Is the graph of y = 2x + 3 proportional?

Back

No, because it does not pass through the origin.

Front

What is the unit rate in the relationship of 120 miles in 2 hours?

Back

The unit rate is 60 miles per hour.

Front

How can you identify a non-proportional relationship from a graph?

Back

A non-proportional relationship will not be a straight line through the origin.