Write an equation to describe the variation. Use k for the constant of proportionality.
-$w$ varies jointly as $x$ and the cube of $y$.
A) $w = k + x + y ^ { 3 }$
B) $w = k x y ^ { 3 }$
C) $w + x + y ^ { 3 } = k$
D) $w x y ^ { 3 } = k$

Question

Quizplus · Accepted Answer

Joint variation means that $w$ is directly proportional to both $x$ and $y^3$, which is correctly represented by $w = kxy^3$.

Write an Equation to Describe the Variation www Varies Jointly As xxx

Write an Equation to Describe the Variation $w$ Varies Jointly As $x$