Direct variation

Direct variation

Multiple Choice

Determine if the relationship between the two quantities is a direct variation. Explain your reasoning.

• yes, the constant of variation is 1/2

• yes, the constant of variation is 2

• no, there is constant of variation.

Multiple Choice

Determine if the relationship between the two quantities is a direct variation. Explain your reasoning.

• yes, the constant of variation is 2

• yes, the constant of variation is 1/2

• no, there is no constant of variation

Multiple Choice

What does the Direct Variation Equation look like?

• Y= kx
• y = mx + b
• y = b
• y = x

Multiple Choice

Does the equation shown below represent a direct variation?

y=2x

• yes

• no

Multiple Choice

Which of the given graphs is a direct variation?

• A
• B
• C
• D

Multiple Choice

Which graph shows a direct variation?

• A

• B

• C

• D

Multiple Choice

Is this a direct variation?

• yes
• no

Multiple Choice

Write the equation for the direct variation, given the table.

• y = 1/3x

• y = 3x

• y = 1/2x

Multiple Choice

Which of the given graphs is a direct variation?

• A
• B
• C
• D

Multiple Choice

Write an equation for this direct variation.

• y=4x

• y=1/8x

• y=1/4x

• y=8x

Multiple Choice

If y vaires directly with x and y= 12 when x= 15. What is the value of x when y= 16?

• 12.8
• 20
• 11.25
• 19

Multiple Choice

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

• 26
• 3
• 58.5
• 2

Multiple Choice

 y varies directly with x, and y is 16 when x is 32. Which equation represents this situation?

• y=32x
• y=16x
• y=2x
• y=(1/2)x

Multiple Choice

y varies directly with x. If y = 12 when x = 2, what is the constant of variation?

• k = 12

• k = 4

• k = 6

• k = 2

Multiple Choice

In the equation y = 14x, what is the constant of proportionality?

• y
• x
• 14

Multiple Choice

What is another name for k?

• y- intercept
• x 
• slope
• x- intercept

Multiple Choice

Which of the given graphs is a direct variation?

• A
• B
• C
• D

Multiple Choice

What ordered pair does a direct variation always go through when graphed?

• (0, 0)
• (1, 0)
• (0, 1)
• (1, 1)

Multiple Choice

Is this a direct variation?
y=2x

• yes
• no

Multiple Choice

Which of the following represents direct variation?

• y = kx

• y = k/x

• y = x/k

• y = mx + b