Direct vs Indirect Variation

The letter k in the equation y = kx stands for

• the constant of proportionality

• king

• queen

Do x and y show direct variation?

y = 5x

• Yes

• No

Is this the graph of a direct variation?

• Yes

• No

Does this table of values represent a direct variation?

• Yes

• No

Does this represent a direct variation?

• Yes

• No

Do x and y show direct variation?

y = 2x + 3

• Yes

• No

The graph of a direct variation must be a straight line and must pass though

• Quadrant 1 and 3

• Quadrant 2 and 4

• the origin (0,0)

Is this the graph of a direct variation?

• Yes

• No

Is the given table a direct variation? If so, what is the constant?

• Yes; 1/4

• Yes; 4

• Yes; 2

• No

Which of the given graphs is a direct variation?

• A

• B

• C

• D