Direct Proportionality

What type of relationship is a direct variation.

• proportional

• non-proportional

What does "k" stand for in the direct variation equation?

• constant of equality

• constant of proportionality

• constant of non-proportionality

Which of the following is the equation format for direct variation?

• y = mx + b

• y = kx

What is the equation to find "k", the constant of proportionality?

• y = kx

• y = mx + b

The phrase "y varies directly with x" means a relationship is a direct variation.

• True

• False

If there is no constant of proportionality, k, then the relationship is NOT a direct variation.

• True

• False

Is the relationship in the table a direct variation?

• Yes

• No

Is the relationship in the table a direct variation?

• Yes

• No

What is the equation for the given relationship in the table?

Does the graph show a direct variation?

• Yes

• No