Direct Variation if there is some nonzero constant k such that
k is called the constant of variation
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Direct Variation Examples 1)
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Suppose y varies directly as x and y = 28 when x = 5. Find the
constant of variation: Write an equation of the form
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Use the equation to find the value of y when x = 3. If you are
not asked to find the constant of variation, you can use a
proportion. Proportion Solve for y
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Increases.
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Inverse Variation As one value increases the other value
decreases and vice versa.
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Inverse Variation Proportion
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How do I determine whether it is Direct or Indirect Variation?
How do I determine whether it is Direct or Indirect Variation?
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Joint Variation One quantity varies directly as the product of
two or more other quantities.
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If y varies jointly as x and the cube of z and y = 16 when x =
4 and z =2, find y when x = - 8 and z = -3.
