7th Grade - Graphing Proportional Relationships - Review

Front

What is the constant of proportionality?

Back

The constant of proportionality is the ratio between two proportional quantities, often represented as 'k' in the equation y = kx.

Front

Write an equation for this relationship: If y increases by 5 for every increase of 1 in x, what is the equation?

Back

y = 5x

Front

What is the constant of proportionality in the equation y = 15x?

Back

15

Front

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

Back

No, because it has a y-intercept of 3.

Front

Which graph represents a proportional relationship?

Back

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

Front

What does it mean for two quantities to be proportional?

Back

Two quantities are proportional if they maintain a constant ratio to each other.

Front

If the constant of proportionality is 10, what is the value of y when x = 4?

Back

y = 10 * 4 = 40.

Front

What is the slope of a proportional relationship graph?

Back

The slope is equal to the constant of proportionality.

Front

How can you determine if a table of values represents a proportional relationship?

Back

If the ratios of corresponding values (y/x) are constant, then the relationship is proportional.

Front

What is a non-proportional relationship?

Back

A non-proportional relationship does not have a constant ratio between the two quantities.