Direct Proportion Equations

What is the value of k in the following equation? y = 2/7 x

• 4

• -4

• 2/7

• 7

For an equation to be directly proportional, it must .......

• pass thru two points

• pass thru the origin

• be positive

• not have a fraction

Which equation is not an example of direct proportion?

• y = x

• y = 3x

• y = - 6x

• y = 2/3 x + 5

Which equation is perpendicular to y= 3x+1

What is the direct proportion equation for the following information. x = 12, y = 16

• 16 = k(12)

• y = kx

• y = 4/3 x

• k = 16/12

Which of the following table shows a direct proportion relationship?

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Which of the following function represents a direct proportion?

• y=1/x

• y=2k/x

• y=kx

• y=0x

Is this a direct proportion?

y=2x

• Yes

• No

Which of the following graph shows a direct proportion relationship?

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