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 quantity is constant.

Front

How can you identify a proportional graph?

Back

A graph is proportional if it passes through the origin (0,0) and forms a straight line.

Front

What is the unit rate?

Back

The unit rate is the ratio of two measurements in which the second quantity is one unit.

Front

If a graph shows a straight line that does not pass through the origin, is it proportional?

Back

No, if a graph does not pass through the origin, it is not a proportional relationship.

Front

What does the equation y = kx represent?

Back

This equation represents a proportional relationship where k is the constant of proportionality.

Front

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

Back

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

Front

What is the cost of one slice of pizza if a pizza with 8 slices costs $12?

Back

$1.50 per slice.

Front

Which of the following is a proportional equation: y = 2x or y = x + 3?

Back

y = 2x is a proportional equation.

Front

What is the slope of a proportional relationship?

Back

The slope is the constant of proportionality, which represents the rate of change.

Front

If a car travels 120 miles in 2 hours, what is the unit rate?

Back

60 miles per hour.