2/20/2014 PA 7 Do Now - Slope and Direct Variation

What is the equation that represents direct variation?

• k = y/x
• x = k/y
• y = kx
• none of the answer

What does k represent in the equation y = kx.

• the x-axis
• the y-axis
• the constant of proportionality
• none of the answers

Given x= -3 and y= 5; write a direct variation equation 

• y= -5/3 x 
• y= 5/3x
• y= 3/5x
• y= -3/5x

Given x= -10 and y= -8; write a direct variation equation 

• y= 5/4x
• y=-4/5x
• y= 4/5x 
• y=-5/4x

Given x= -1/2 and y= 7/3; write a direct variation equation 

• y=-3/14x
• y= 3/14x
• y=14/3x
• y= -14/3x

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

• Yes; 1/4
• Yes; 4
• Yes; 2
• No

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 the equation for the table given.

• y = 1/3x
• y = 3x
• y = 1/2x

What is the constant of proportionality?

• 8
• 16
• 24
• 2

Tags

CCSS.HSF-LE.A.1B