pre-algebra: direct variation

In a direct variation, y=39 when x=3.  Find the value of y when x=2.

• 26
• 3
• 58.5
• 2

Is this a direct variation?
y=2x

• yes
• no

Write an equation for this relationship.

• y=4x
• y=1/8x
• y=1/4x
• y=8x

Which of the given graphs is a direct variation?

• A
• B
• C
• D

Write an equation for this situation.

• y=9.75x
• y=19x
• y=19.25x
• y=9.5x

What is the constant of proportionality?

• 8
• 16
• 24
• 2

Does this equation show direct variation?

y + 3 = 14x

• Yes

• No

• y
• x
• constant of proportionality
• origin
• x-intercept
• y-intercept
• x-axis
• y-axis

• y
• x
• constant of proportionality
• origin
• x-intercept
• y-intercept
• x-axis
• y-axis