Equations of Proportional Relationships

Which line shows a proportional relationship between x and y?

• Line L

• Line M

What is the formula for a proportional relationship?

• y=kx

• y=k/x

• z=ykx

• y=ky

In the equation y = 14x, what is the constant of proportionality?

• y

• x

• 14

If the constant of proportionality is 10, which of the following is the correct proportional equation?

• 10=kx

• 10=k

• y=10k

• y=10x

Is the given table a proportional relationship? If so, what is the constant?

• Yes; 1/3

• Yes; 3

• Yes; 5

• No

The constant of proportionality of this graph is k = 45. What does it mean?

• The boat travels for 45 miles for every 45 hours

• The boat travels 1 mile for every 45 hours

• The boat travels 45 miles for every 1 hour

• The boat travels 1/45 mile for every 1 hour

Write an equation that represents the relationship between the weight(x) and the cost(y).

• y = 1/2 x

• y = 1/4 x

• y = 2x

• y = 4x

What is the equation for this table?

• y = 4x

• y = 2x

• y = 0.5x

• x = 2y

What is the constant of proportionality ? (Unit rate)

• 2 tiles per minute

• 3 tiles per minute

• 4 tiles per minute

• None of the above

What does k represent in the equation y = kx?

• constant rate of change

• constant of proportionality

• the equation

• x/y