Direct Variation Review #2

What type of relationship is a direct variation.

• proportional

• non-proportional

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= mx + b

• y = kx

Does the given graph show a direct variation?

• Yes

• No

What is the constant of proportionality, k, for the given graph?

• k = 15

• k = 5

• k = 3

What is the equation for the given graph?

Is the given relationship shown in the graph a direct variation?

• Yes

• No

What is the equation for the given graph?

Does the table represent a direct variation?

• Yes

• No

When y = 12, x = 6. If y varies directly with x, what is the value of y when x = 18?

• y = 2

• y = 9

• y = 36

• y = 24