Find the Variation Equation for the Variation Statement $z$ Varies Jointly As

question 217

Multiple Choice

Find the variation equation for the variation statement.
- $z$ varies jointly as $y$ and the cube of $x ; z = 960$ when $x = 4$ and $y = - 5$

• A) \(y = 3 x ^ { 3 } y\)
• B) \(y = - 3 x ^ { 3 } y\)
• C) \(y = - 3 x y ^ { 3 }\)
• D) \(y = 3 x y ^ { 3 }\)

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